I've been trying to upgrade GTK+2.2.1 to GTK+2.4.0, and it's gone bad. After many installations, uninstallations, cursings, etc., I managed to get this error when starting practically ANY GTK application:
relocation error: /usr/lib/libgtk-x11-2.0.so.0: undefined symbol: gdk_threads_lock
I've tried uninstalling GTK/libgtk completely and reinstalling it, but that never helps, no matter what version I reinstall. Anyone?

the older version of gtk did not have a symbol
gdk_threads_lock/unlock but instead used a global variable
gdk_threads_mutex (i think) in the modern version gdk_threads_lock/unlock
are present and undefined in alot of gtk libs but i think are defined B (Base) in libgdk-x11
anyway you should be able to see them as defined
objdump -T /usr/lib/libgdk-*.so | grep "gdk_threads_lock"
i think you will have to recompile or upgrade the apps that no longer work
or just go back to the old version of gtk

i don't quite understand why you can't roll back ?????

exactly what steps did you take to get back to the old version ??
or i should say to get where you are now ?

you didn't by chance compile a new version of glib without thread support did you ??

Thanks for the help, I made a complete removal of GTK (I suppose it didn't work before...), then reinstalled. Problem fixed, although the reason for upgrade was to get a better version of the GIMP (I'm on 1.2.3)... Still, there's a new problem. No images are displaying in GTK apps, the console readout is saying stuff about png, xpm, jpg, and all sorts of image formats not supported. Any ideas?

Bump (sorry if it's too early).