Looks like Adobe doesn't care about this bug - it has been reported since April and it's still not fixed and bug commits keep getting marked as "not able to reproduce" - what a joke. If you tried all other methods revolving around proprietary Flash and none worked, you can try this:
# yum remove flash-plugin
# yum install gnash-plugin gstreamer-ffmpeg
, but HD works slowly
, but animation is choppy and there are no sound effects, some loading screens will loop themselves
Perhaps if there was a way to make Gnash handle only video streams, and Flash just swf, that'd be fine. Open for improvement.