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[Jan Vlnas <967091@xxxxxxxxxxxxxxxxxx>]

To my knowledge (and from my tests) Flash Player 11.1 doesn't support Stage Video HW acceleration on Linux, 11.2 is the first version which supports hardware decoding through VDPAU (and therefore causes this bug).
By downgrading to Flash Player 11.1 you probably won't get HW accelerated video, but you will definitely get known security vulnerability, see http://www.adobe.com/support/security/bulletins/apsb12-07.html – while the first one seems to be WIndows only, the second one (CVE-2012-0773) allows an arbitrary code execution on all platforms. But hey, it's your call.

If you still want to downgrade, Flash Player 10.3 is maintained, see
http://helpx.adobe.com/flash-player/kb/archived-flash-player-
versions.html#main_Archived_versions – it is possible this version also
supports EnableLinuxHWVideoDecode without crashing so often (I've not
tested it).

Again, currently the easiest/most stable/safest way to fix colours is to disable hardware acceleration in Flash Player Display settings: http://www.macromedia.com/support/documentation/en/flashplayer/help/help01.html
If the Settings window doesn't respond to clicks, switch to Unity 2D, uncheck the box and switch back to standard Unity. 

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2012-0773

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https://bugs.launchpad.net/bugs/967091

Title:
  Wrong tint with Nvidia after upgrading to 11.2

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