So I forced a shutdown on my mac running 10.10.4 Yosemite, and when I restarted Bitcoin-Qt v0.8.4 I get:

"System Error: Database Corrupted". I then click OK, and the program "quits unexpectedly"

After googling a bit, I find what seems to be a simple fix.  I goto /library/application support/bitcoin/blocks
renamed the "index" folder to "index1", and restarted bitcoin-qt.

This seems to help.  The program opens without the error message and begins reindexing.  It shows a balance of 0 BTC, but an unconfirmed balance equal to my original balance.

However, now I see the message "Warning displayed transactions may not be correct, you may need to upgrade or other nodes may need to upgrade".  I let it sit for 5 days straight and nothing changes.  It still reads "synchronizing with network" across the bottom, but the status bar hasn't moved.

Now I'm getting worried.

I quit the program, copy my wallet.dat file to the desktop and run this code in terminal:

open /Applications/Bitcoin-Qt.app --args -salvagewallet

Now everything is the same, but even my UNCONFIRMED balance shows as zero!

Any help would be appreciated.  I never thought bitcoin was this fragile.