I have just came across a Reddit post stating that around 5,500 emails + plaintext passwords have been leaked by some site:
http://www.reddit.com/r/dogecoin/comments/1w1ta2/a_list_of_roughly_5500_emailsusernamespasswords/I suggest you check whether or not your email is on that list.
OP is a huge dick by hiding the site but the top 2 candidates it seems are LTC4You.com and Cryptsy.com
Edit: Probably
not Cryptsy as the passwords were in plaintext. However, please use throwaway passwords when signing up for pools/faucets as most of them use the same script (which means they also save your password in plaintext).
Edit #2:
It's confirmed to be LTC4You.com. Here is the site confirming it:
http://www.cryptocoinsnews.com/2014/01/25/ltc4you-com-emails-possibly-password-leaked/. I'm seriously pissed that they kept a 5,500 leak hidden just to protect their reputation.