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Description of problem: After yum update firefox does nolonger start Version-Release number of selected component (if applicable): $ rpm -qf `which firefox` firefox-5.0-2.fc15.i686 How reproducible: Every time Steps to Reproduce: 1. type: firefox 2. nothing happens 3. Actual results: firefox does not start Expected results: firefox starts Additional info: When I ran: strace firefox I got a popup abrt message of a crash in xulrunner, which crashed itself...
Further research of the system learned that /usr/lib/libgtk-x11-2.0.so.0.2400.4 was corrupted. After yum reinstall gtk2 everything works again.