Same here, after yesterday's upgrade.
While I was doing the upgrade, I got a fatal error.
Dialog said some file was not going to be overwritten because it was also contained in something else -- cannot remember the exact error.
I haven't tried fixing it yet. Doesn't really effect me, because I normally run the raw trunk release (currently Chromium 31)
Chromium 31.0.1626.0 (Developer Build 221966)
Blink: 537.36 (@157409)
Flash: 11.2 r202
User Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1626.0 Safari/537.36
Command Line: /home/vindsl/.chrome-linux/chrome --disable-setuid-sandbox --user-data-dir=/home/vindsl/.config/chromium-canary --flag-switches-begin --flag-switches-end
Executable Path: /home/vindsl/.chrome-linux/chrome
Profile Path: /home/vindsl/.config/chromium-canary/Default
You could try the trunk build (not for the faint of heart). It requires manual installation/updating.
If you're not comfortable doing that, I'll try to fix Chromium 29 later today, and post the results here.