What mono version?

Im using 1.1.7. But maybe there is another problem. Sometimes the whole computer
just freezes (I suspect this to be the NVidia driver) and I have to do a hard
reset the machine, and then I come across corrupted files. Sometimes the system
doesnt even start. So maybe this may be the case of a corrupted file.

I reverted today to "24 May 2005". I get no crashes or segfaults. So this can be
the multiproperty patch causing this?

Using instructions from dsd, I reverted out the multi-value properties commit
which fixed the Segmentation Failure on Best. Using Mono 1.1.7 on Ubuntu Hoary.

I too found this problem and debugged the code and found that Template.cs (line 
133) would set formatter = null; and the following switch (formatter) would do 
a NullPointerException. I have checked in a fix y'day. Can some verify the fix 
is fine ? 

thanks

The fix wasn't quite right, but I found the bug and fixed it in CVS.