A short one.
I had this problem some time ago, and today I've seen someone else on #eclipse IRC channel to have it. If you are running 64-bit Linux (esp. Gentoo) and Eclipse Galileo and your eclipse keeps crashing with XPCOM error -2147467262, then fear no more. this is what you should do:
- turn off all Eclipse instances
- delete following files:
-Dorg.eclipse.swt.browser.XULRunnerPath=/usr/lib64/xulrunner-1.9.1/libxpcom.soto the end of your eclipse.ini file (actual path to your libxpcom.so may be different)
- you are done. You may use your Eclipse safely
This tip is based on comments 11 and 12 in this bug report.