Opened Bitcoin-Qt (0.8.2 beta, on mac osx 10.8.5 ssd hard drive) and here's what I got:

Opened Bitcoin-Qt (0.8.2 beta, on mac osx 10.8.5 ssd hard drive) and here's what I got:

So it seems your block database is corrupted, and you'll need to rebuild it.
There was a known bug that caused this relatively frequently on OSX, but it is believed to be fixed in 0.8.6.