You could start by installing wine with debug-symbols (e.g. compile wine yourself) I don't know what distro you use, but on Ubuntu there are good guidelines howto compile and install wine from source. Also , if you have a windowspartition lying around, you could try to copy shell32.dll and shlwapi.dll from windows' c:\windows\system32\ to ~/.wine/drive_c/windows/system32/ then set these dlls to native in winecfg, and see if the crash is gone, than at least you'll know that the bug is in shell32
