TIPS FOR WINDOWS WALLET
not working?
1. delete everything in appdata/roaming EXCEPT wallet.dat
2. run wallet
3. after it freezes, kill it from your task manager (must be done or else you'll keep getting bad popup/wont open)
4. download the new wallet from this site (windows installer or the zip/whatever)
5. run setup/install as a fresh one, install it to the same natural directory as it was before (dont change), it'll install the new wallet files into that folder where your original wallet.dat is sitting
6. run the new wallet and bam, it should work.  
7. run the debug window under 'help' and copy/part some  < addnode "xxxxxxxx" add > numbers in there, like 4-5 of them individually and wait a bit...it'll then sync up (right now it's stuck at 99% at the end due to traffic)

you are golden this way.