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This is a fresh install of Ubuntu 12.04, all browsers crash, especially when using Google Mail or Google Drive / Docs. I am using Google Chrome Version 23.0.1271.97 and Chromium Version 23.0.1271.64 Ubuntu 12.04 (165188). Firefox quits on crashing whereas the Chromium based browsers individual tabs crash. The problem also exists with Opera. I have tried creating a new profile. When running Chrome from the command line I get this error on tab crash:

third_party/tcmalloc/chromium/src/free_list.cc:133] Memory corruption detected.

as well as [22322:22322:0102/125148:ERROR:layout.cc(160)] Not implemented reached in ui::ScaleFactor ui::GetScaleFactorForNativeView(GtkWidget*)

and also ALSA lib pcm_dmix.c:957:(snd_pcm_dmix_open) The dmix plugin supports only playback stream

I have also tried clearing the cache, uninstalling, purging, reinstalling and still this problem persists. I have tried different versions of Google Chrome and still this problem persists.

What should I try next / what output should I include to help in finding the problem?

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Maybe your problem isn't software related, but hardware. You could run the memtest on Ubuntu install media, LiveCD or USB install, to check for problems in your memory modules. –  ThiagoPonte Jan 2 '13 at 13:12
    
What's your DE? If Unity, go to Unity 2D, it can fix some problems. –  ZDroid Jan 2 '13 at 13:21
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@ThiagoPonte - you got it in one! Ran memtest and thousands or errors appeared immediately. Just bought some new RAM and all is now good! Thank you :) –  Mark Aroni Jan 2 '13 at 14:41
    
Glad i could help. I guess my answer shouldn't have been converted to comment after all. –  ThiagoPonte Jan 2 '13 at 16:31
    
Make an answer so I can accept it... :) –  Mark Aroni Jan 2 '13 at 20:26
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up vote 2 down vote accepted

Maybe your problem isn't software related, but hardware.

You could run the memtest on Ubuntu install media, LiveCD or USB install, to check for problems in your memory modules.

Glad i could help you Mark Aroni.

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