Python/Tkinter DLL conflicts on Windows

[Russell Blau]

I have some Tkinter programs that I run on two different machines.  On 
Machine W, which runs Python 2.5.1 on Windows XP, these programs run fine. 
On Machine H, which runs Python 2.5.1 on Windows XP, however, the same 
programs crash regularly.  The crashes are not Python exceptions, but rather 
are reported by Windows as errors in pythonw.exe.  (Of course, the error 
messages themselves contain absolutely no useful information.)  This happens 
whether I run them from the command prompt or from IDLE (although IDLE 
itself never crashes).  Further, the crashes occur at unpredictable times; 
sometimes the program will crash almost immediately upon startup, while at 
other times it will run for a while and then crash.

Also, I'm not sure whether this has anything to do with my problem, but 
Machine H also has Python 2.2 installed on it, while Machine W does not.

I recall seeing a message at some point that suggested that conflicts in the 
MS VC runtime DLLs might cause this sort of problem, but I haven't been able 
to find that information through a search, so I'm not sure which particular 
DLLs to look for.  Any help in tracking down the source of this problem 
would be appreciated.

Russ