Don't know if this applies to MAC, but definitely an issue 
with PC users.
Be CAREFUL what you 'scribble' when naming tracks...
If you use a slash, you will CRASH!  Vegas attempts to save 
the .wav files using the text in the scribble strips as 
filenames.  I'm not sure what other characters are illegal, 
but slashes will kill you.
SF - Please put a simple validation of the strings typed 
into the scribble strips.  After I started crashing 
repeatedly, I uninstalled and re-installed both my hardware 
and software before realizing that Vegas was crashing 
because I had a slash in a scribble strip.  Save others the 
hassle!!!