Version:           valgrind-3.3.0-Debian (using Devel)
Installed from:    Compiled sources
Compiler:          gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7)  
OS:                Linux

I am trying to profile a debug version of mobile firefox. The program starts with:

valgrind --trace-children=yes --tool=callgrind --instr-atstart=no  ./tip/obj-xr-dbg/dist/bin/xulrunner ./fennec/touch/application.ini 

and crashes with an assert in callgrind code. The annoying part is that the crash is only 90% reproducible. If I crash once, I've never been able to run it again without a crash. But, if I reboot, I can get lucky and get a few runs in before it crashes again.

I was able to work around the crash by commenting out the call to gnome_vfs_mime_get_default_application in my code. Noticed it on the stack on every crash, so I just gave it a shot.

BTW, valgrind is awesome! I have not had to do heavy duty profiling in a few years, and this is so much better than what we used to do.