I had the same problem on Ubuntu 11.10 (adobe-flashplugin 11.2.202.228-0oneiric1) and nVidia GeForce 9600 GT.
sudo mkdir /etc/adobe echo -e "EnableLinuxHWVideoDecode=1\nOverrideGPUValidation=true" | sudo tee /etc/adobe/mms.cfg > /dev/null
Those commands resolved it no more problems with colors.
I had the same problem on Ubuntu 11.10 (adobe-flashplugin 11.2.202. 228-0oneiric1) and nVidia GeForce 9600 GT.
sudo mkdir /etc/adobe ideoDecode= 1\nOverrideGPUV alidation= true" | sudo tee /etc/adobe/mms.cfg > /dev/null
echo -e "EnableLinuxHWV
Those commands resolved it no more problems with colors.