It doesn't give me confidence that (in addition to having security holes, issues with rounding errors, etc) Bitcoin's biggest exchange apparently doesn't know how to switch hosts without massive downtime.
+1 This is unacceptable, even with the host file workarounds and even though I'm not an active trader there. It just doesn't give Bitcoin a serious image.
It gives Bitcoin a kind of wild west image. I'm not sure if that's a bad thing.
To me, things like this remind me how pioneering the Bitcoin universe still is.
If you want to be where the exciting stuff is happening in history you can't expect everything to be safe and predictable.
As for "unacceptable", I was always aware that mtgox is a homebrew project like most Bitcoin businesses, and I am happy to keep supporting them/him nontheless. I never expected their reliability and security to be on a par with Bloomberg.