Description of problem: When gnome-control-center loads webkitgtk via one plugin and dri drivers via another plugin, some llvm code seems to allocate a string via webkit allocator and frees it via the default allocator. This is something that I'm not sure isn't a gcc/libstdc++ bug but from reading on webkit, its recommended on some platform to not override the default malloc. It also appears that webkitqt doesn't do this. So we should patch webkitgtk3 to not enable its global memory allocator override.
Or at least it should hide its definition of these symbols from the dynamic symbol table via __attribute__ ((visibility ("hidden"))) -- see also http://gcc.gnu.org/wiki/Visibility
Looks like http://trac.webkit.org/changeset/122011/releases/WebKitGTK/webkit-1.8 is supposed to fix this on upstream 1.8 branch.
webkitgtk3-1.8.3-1.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/webkitgtk3-1.8.3-1.fc17
Package webkitgtk3-1.8.3-1.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing webkitgtk3-1.8.3-1.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-13029/webkitgtk3-1.8.3-1.fc17 then log in and leave karma (feedback).
webkitgtk3-1.8.3-1.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.