Vegas 8 acting up again
 

Here we go again, don't know who else has these issues, but Vegas 8 still has a mind of its own, everything fine until recently, have to reinstall more frequently, titler still doesn't work right, today all the fx keys were gone, blank, Vegas 8 is still unstable. I still have a cineform issue off and on.

I'd suggest your computer has a mind of it's own, Vegas 8 is quite solid on many machines here, ranging from MacBook Pro/bootcamp to very old P4 machines. That said...
What else is running on your machine? Sure your powersupply can manage the load? What about RAM? Antivirus?

me stable too
 

after initial teething troubles, i too have a stable Vegas platform. Occassionaly during rendering to WMV vegas will exit without so much as an error message. but never seen the problems you have mentioned.

It was OK for a while, all of a sudden some crashing, I did try a demo of NEO 4k which didn't work for me at all and that crashed vegas merely by opening the folder I had the clips in. Had to uninstall and go back to NEO HDV, which that crashes vegas if I use mov. clips from cineform. At least its easy to re-install Vegas, only takes a few minutes, just annoying.