When using my webcam (in my case a Microsoft LifeCam HD 3000, but I heard that other webcams from a variety of manufacturers had the same problem) with for instance skype or cheese while Google Chrome is simultaneously open, the webcam blinks and freezes. In skype, switching webcam off and then on again solves it temporarily but then the crashes become more frequent and then it just won't work at all.
This fix solved the problem, but broke flash in chrome instead:
"If it starts blinking when you access flash in Google Chrome, it might be caused by a bug in their Pepper-based Flashplayer. To fix it, go to about:plugins in Chrome, click +Details to expand all items, then disable the plugin /opt/google/chrome/PepperFlash/libpepflashplayer.so. Leave the regular libflashplayer.so plugin enabled, or install it if you need to. Should stop the blinking." (http://askubuntu.com/questions/157047/webcam-keeps-blinking-for-no-reason/184776#184776)
After this fix fullscreen youtube videos were chopped when played, whereas they were OK again when I re-enabled the plugin.
So apparently, both things, Chrome (or rather the pepper plugin in Chrome) and a functioning webcam cannot coexist at the same time.
Package: google-chrome-stable version 21.0.1180.89-r154005
Description: Ubuntu 12.04.1 LTS
Release: 12.04
I tried to change the bug report to "affects google chrome" but I guess since Chrome is not in the official repository that won't work. I'll best let somebody else handle the classification of the bug...