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2281  Other / Beginners & Help / Re: i think i did something wrong on: December 25, 2012, 01:25:50 AM
today a was funding my virwox account and testing it sending 0.5btc but then i got the error: transaction creation failed , any help with that?

With the Bitcoin.org client if your wallet contains a lot of microtransactions, such as those coming from the free bitcoin sites, or the losing transaction payouts from SatoshiDICE, or from a mining pool with the payout threshold too low, then you've hit a scenario that the client doesn't deal with very well.

One workaround is to break up your spend into several transactions using smaller amounts.  Choose a smaller amount and send that amount to an address not in your own wallet (e.g., to an Instawallet or some other EWallet).  Then do another one and continue until all the funds from these small transactions are spent.  

Another workaround is to import the private keys into another client that doesn't have this same problem.

It is possible this issue will no longer occur with the next release of the client (v0.Cool since much of the database code has been reworked but there's no ETA yet on that.
2282  Other / Beginners & Help / Re: NVIDIA Tesla C2075 Server Rack Cluster on: December 24, 2012, 10:19:07 PM
Even with the Tesla power? These are pure GPU servers.

 - http://en.bitcoin.it/wiki/Why_a_GPU_mines_faster_than_a_CPU#Why_are_AMD_GPUs_faster_than_Nvidia_GPUs.3F

Now you might want to take a look at what CoinLab is creating.    They are building a client that you run and earn bitcoins.  It will performing computing tasks, not necessarily be used for bitcoin mining.  They are still working on the HPC client (which will do much better on NVidia than AMD).  Currently, they just operate a mining pool though.
 - http://bitcointalk.org/index.php?topic=99643.0
2283  Bitcoin / Mining support / Re: Advise needed on: December 24, 2012, 09:56:49 PM
What are the best ATI cards to mine with and ones that are cheap to buy and provide good hasrates.

I hate to be debbie downer here, but GPU mining is just about done for.  If you pay anywhere near ten cents per kWh or more, you are losing money with each hash.
 - http://blockchain.info/charts/miners-operating-profit-margin

i.e, There are no pros and cons, because there's just no sense to buying GPUs for mining at this late stage of the game.
2284  Other / Beginners & Help / Re: Melting Coins? on: December 24, 2012, 09:55:03 PM
Does anyone have experience with actual melting of coins? If someone was to horde physical coins with the expectation of trading them in for their base value in the future, how would one go about it? Who would buy the base metal?

There's a bitcoiner learning the ropes right now.  Here's a video of him creating an ingot from melted jewelry and other scrap:
 - http://www.youtube.com/watch?v=YKak7tPxd2M#t=1109s
 - http://bitcointalk.org/index.php?topic=133022.0

There's a little backstory there to be sure.

But that shows the amount of effort to convert silver items to silver usable for trading and why physical silver is sold above spot market rate.
2285  Other / Beginners & Help / Re: technocashier.com scam or legit? on: December 24, 2012, 09:21:00 PM
They took me for nearly $13K.

Bitcoin is starting to pressure these digital currency exchanges.  

Where they used to get 6%, or 8% to convert funds, they instead are now facing competitors like AurumXChange, which takes a minimal fee (1% for LR --> Mt. Gox,  2.5% for Mt. Gox --> LR).    So some of them turn to running scams (or increase the level of scamming they perform).

If they only scam the larger transactions, they can keep their long confidence game going (by processing successfully the smaller transactions, which gives the customers confidence to continue using the service except with larger transactions.  That works until one day, bam! Scammed.)
2286  Bitcoin / Development & Technical Discussion / Re: possible to avoid double spends if accepting unconfirmed transaction? on: December 24, 2012, 08:50:13 PM
i ask this as some businesses are trying to figure out a way around the 10 minute confirm times by atleast seeing the transaction history of the customer

i see on blockchain info that it does list transactions even without a confirmation. is there a way for EG satoshi dice to check the senders address for any other transactions that they have sent within the last 5 minutes before the satoshi dice received theirs and decline the payment for instant use if there was more then 1 unconfirmed transaction within 5 minutes prior to the transaction.

meaning that customers who only do transactions with atleast a 5 minute gap from a previous transaction elsewhere will get an acceptable instant use acceptance.

Are you referring to how a merchant might receive a transaction that itself is based on a prior transaction that has not yet confirmed? 

If so, then yes that can be determined either from the blockchain or with the help of third party services such as Blockchain.info.

The Bitcoin.org client doesn't let a transaction use a coin that has not confirmed (unless it is change from a previous transaction) but other clients don't have that restriction.

2287  Economy / Service Announcements / Re: PicoStocks, bitcoin stock exchange on: December 24, 2012, 08:07:12 PM
The main concept of the new model is that PicoStocks is the legal owner of all assets.
[...]
PicoStocks is a legal person established under the jurisdiction of Marshall Islands.

I've been wondering how long before someone takes this approach.  More overview of Marshall Islands:
 - http://www.healyconsultants.com/company-incorporation/marshall-islands-company-formation.html

The FAQ gives additional useful info:
 - http://picostocks.com/pages/faq
2288  Other / Beginners & Help / Re: Large Technocashier.com Scam on: December 24, 2012, 07:31:03 PM
Check Talkgold forums for numerous complaints against them.

Another thread on the topic:
 
technocashier.com scam or legit?
 - http://bitcointalk.org/index.php?topic=102744.0
2289  Other / Beginners & Help / Re: The Best Bitcoin Exchanger? on: December 24, 2012, 07:23:33 PM
Dear Members,

Please share your experience, which website, exchanger, service is the best in case I need to exchange bitcoins to any
other e currency like Liberty Reserve, Perfect Money, Bank Wire or are there any debit card service?

To Liberty Reserve your options are:
  AurumXChange, BTC-e, Bitcoin.de, Vircurex, and a number of e-currency exchanges like ECurrencyZone, Lillion Transfer, WM-Center, etc.

AurumXChange
 - https://www.aurumxchange.com/exchange  <--- Now takes Bitcoin directly

To Perfect Money your options are:
 AurumXChange, BTC-e, ECurrencyZone, and WM-Center.

For bank wire (presuming you are asking about domestic transfer) and debit card transfer will depend on where you are located.

A fairly comprehensive list of exchanges:

 - http://en.bitcoin.it/wiki/Buying_bitcoins
 - http://en.bitcoin.it/wiki/Selling_bitcoins
2290  Bitcoin / Bitcoin Discussion / Re: Is it just me or do ALOT of bitcoin sites look just awful? on: December 24, 2012, 07:07:24 PM
What do you guys think?

Bitcoin sites serve a small subset of the population and aren't necessarily big earners.

Good design is expensive with costs are incurred up-front.   A few Bitcoin-related services are generating profit right off the block (e.g., SatoshiDICE) so as to be self-supporting but most others would require the investment to be able to pay for UX and design help.  Bitcoin businesses don't have the same type of investor base as most other e-commerce and online businesses, so even if a programmer who launched a service wanted to get a better design and is willing to give up equity to do so, there might not be any investors willing to make that leap of faith as well.

When there's money to be made, better design will be a component that differentiates services.    In the meantime, a service that competes by being lean and functional trumps being beautiful.
2291  Other / Beginners & Help / Re: Request on: December 24, 2012, 11:26:16 AM
Just for future reference, you can also trade to and from MoneyBookers using VirWoX:
 - http://www.VirWoX.com

But there were better offers here from others.
2292  Other / Beginners & Help / Re: want to buy GBP on: December 24, 2012, 11:24:29 AM
hi everyone last time i was asking if someone knew how i can exchange bitcoins into GBP in my moneybookers account, so i failed to find a way.
Thats why i am here looking for a seller (want to buy 15.00 transfered to my moneybookers account)
any help in https://bitcointalk.org/index.php?topic=127175.0 would be apreciated.see ya

You turned down bcb's offer.  Then you post here that you still need to do a trade? Am I missing something?
2293  Other / Beginners & Help / Re: Pre-Paid Debit Card to Bitcoin (VISA, MasterCard, gift cards, etc.) on: December 24, 2012, 11:01:47 AM
The subject pretty much says it all.  I always see trading sites that offer prepaid cards for bitcoins, but I never see any that accept them and give you the bitcoins. 

There had been a few individuals or exchanges in the past that would take this.  The fees were in the 10% range.

A prepaid debit card usually will function at an ATM.  There are many methods for buying bitcoins for cash.  That might be your best option.

For instance, with Bitme you can deposit cash at any Chase bank location and the funds will be credited to your exchange account:
 - http://www.BitMe.com

There is also BitInstant.com where you deposit cash at 7-11, Walmart, CVS or any Moneygram location:
 - http://www.BitInstant.com

2294  Other / Beginners & Help / Re: How long does it take to synchronize? on: December 24, 2012, 10:48:13 AM
I downloaded the bitcoin wallet program yesterday.  After 24 hours+ it is still "synchronizing with network".  About how long does this process take these days?

On slower equipment it could be three days even. 

Having an encrypted filesystem will really slow things down.  Having your computer go to sleep on inactivity will really slow things down. 

There are a couple tricks to speeding it up if starting from scratch (e.g., pull down bootstrap.dat from torrent) but you are probably well past getting any benefit from that.
2295  Economy / Marketplace / Re: [ANN] LocalBitcoins.com - a location-based bitcoin to cash marketplace on: December 24, 2012, 10:20:59 AM
Needed feature:

Since LocalBitcoins holds a wallet, then anyone with my username and password has access to my funds.    Until LocalBitcoins supports a two-factor authentication (2FA, e.g., Google Authenticator) I won't be using the site for any funds except for a trivial amount.

If you do add 2FA. also any withdrawal (send) would require an OTP to be entered.   Others might want to see 2FA required on login as well, but at a minimum if I have 2FA enabled for my account then each withdrawal (send) should require an OTP.

2296  Bitcoin / Development & Technical Discussion / Re: Where is a good place to report a bug to Satoshi main client? on: December 24, 2012, 10:04:13 AM
my computer has a little problem: it resets almost everyday, at least once, with no obviously reason.

Did you recently upgrade memory?   Sometimes it is something like incompatible memory that can cause this.  Or other hardware issues.

Those types of issues are tough to resolve. 

When I delete blk* I can start it again but everything starts from scratch

The bitcoin.org client uses BDB and it is a database that has the ability to recover from crashes.  There are BDB databases other than blk*, there is also wallet.dat and peers.dat.   If you don't yet have any funds on your wallet, then you can wipe the entire bitcoin directory and have it try from a completely clean, known state.

I had to stop to use the main client, but I want to use it because I know the main client is the best for the network p2p.

Running the full blockchain client isn't for everyone, but if you want to keep at it you probably want to resolve the once-a-day system crash issue first.

The next version of the bitcoin.org client uses a different storage system (LevelDB).  I haven't learned up on it yet to know if it might function better in an environment where system crashes are frequent so I can't say if this situation you find yourself in would still occur or not.  What I do know is that with the next version if you did need to wipe the blockchain and pull a fresh one, doing so is something measured in minutes (e.g. 250 minutes maybe) versus days.
2297  Bitcoin / Bitcoin Discussion / Re: List of Major Bitcoin Heists, Thefts, Hacks, Scams, and Losses on: December 24, 2012, 06:03:56 AM
Add BitMarket.eu to the list.  From another thread:

Earlier this year, I had this "genius" idea which led me to making a fatal mistake. I thought I could provide a hedge fund service for Bitmarket users.
[...]
For the record - there are 20161 19980 BTC missing
  [Edit: Fixed the link to the quote.]
2298  Bitcoin / Press / Re: 2012-12-23 The best performing currency against the USD on: December 24, 2012, 05:08:26 AM

Sigh ... where to start?

Quote
For more background on Bitcoins see this story from Wired Magazine (Wikipedia does a terrible job describing this process).

Heh, and I though for the most part the wikipedia article on Bitcoin was getting to be halfway decent.  (Excluding the "it's a ponzi schem" brewhaha).

Quote
The whole premise of this type of private network is to create anonymity online (see TOR Project).

Bzzzzt.   No, but thank you for playing.

The whole premise is to be decentralized so that the currency cannot be corrupted by political or other ambitions.

Quote
That means it is impossible to trace an online transaction.

Using the term from Jon Matonis, Bitcoin offers user-definable anonymity.   If you want it to be anonymous, you have options available to you that can help protect your privacy.  But every transaction is traceable in the public ledger.

Quote
And therein lies the flaw of the Bitcoin concept: transaction anonymity attracts illicit activity.

Cash is used for a lot more illicit activity than bitcoin is.  Is that a flaw?  Lots of people might think so.   But an even greater number of people will not give up cash, for various reasons including the property of it being able to used privately.

Quote
Unfortunately one explanation that stands out is the increased demand for illicit drugs online. Quite sad actually.
SatoshiDICE is by far the single largest component of transactions, then speculation, then about an order of magnitude smaller you might find the number of transactions associated with illicit activity.

But I guess it is easier to explain it away with the most sensationalistic component even after showing numbers that don't justify it being all that significant.

Quote
Nevertheless Bitcoin is the 2012 winner for the best performing currency against the dollar.

As it was in 2010 and 2011 as well.

2299  Economy / Service Discussion / Re: Coinbase Blog - Buy And Sell Bitcoin By Connecting Any U.S. Bank Account on: December 24, 2012, 03:33:51 AM
And now I cannot even get into my account...

Quote
Coinbase Error
Whoops! It looks like we encountered a problem.

We've been notificed about the problem and are working on it. Please try again in a few minutes or you can return to the homepage.

Anyone else having issues with the site?

I was just able to login successfully.
2300  Bitcoin / Development & Technical Discussion / Re: DoS attack against the entire Bitcoin network ? on: December 24, 2012, 03:20:53 AM
. . . if a miner has to start choosing which transactions to include in a block, your spam-like transaction doesn't get chosen . . .
Correct me if I'm wrong, but it is my understanding that it isn't just miners that might ignore a fee-free transaction with recent (young) coins or large number of inputs.

Don't many of the clients also refuse to relay these transactions?  Meaning that most of the network won't even see (and have to deal with) the transactions, preventing them from flooding the network.

Miners can do whatever they want, including "ignoring" transactions.  

I'm not sure the exact behavior of the Bitcoin.org client.

Using the description from the Wiki (posted above), the
 
If a fee of 0.0001 BTC is paid, the client will relay it.   If that fee is not paid, the client will still relay it even if no fee is paid as long as all outputs are 0.01 BTC or larger and the total size is less than 10KB.  It does not appear that the age of a coin has any affect on whether or not the node will relay the transaction.

Now just because a node will relay the transaction doesn't mean the fee is sufficient to get it included in a block in a timely manner.
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