Comment 26 for bug 1439288

Basically, do a first run with the normal Thunar and look at the report. Lookup for "Invalid read" and "Invalid write". Every time there is a memory error, Valgrind will add a trace of the functions that were being called when the error occurred.

If you're missing debugging symbols for one library, you'll see a lot of "???". For instance, I just spotted an error in libcairo, so I'll install the debugging symbols of libcairo rather than Thunar.