The issue with Google Chrome was that it crashed in about 3 seconds after startup. I encountered this problem using Chrome 9 and 10 beta on Ubuntu 10.10, but this fix may apply to other versions and operating systems as well.
I’ve tracked the problem as being related with the account (data) synchronization. After disconnecting my internet connection it did not crashed anymore, so I went to the Preferences page (Wrench -> Preferences -> Personal Stuff) and stopped the account synchronization. Then closed Chrome, restored the Internet connection, restarted Chrome and everything went OK.
Trying to re-enable the account synchronization just caused another crash, thus this is definitely the cause of my Chrome problems. Strangely I was able to re-enable the sync after several days, but the problem also re-appeared after restarting Chrome.