Flash not working on certain sites

[MrPink]

For some reason I cannot stream flash video from certain sites. It started suddenly a few days ago.

The list of sites that doesn't work so far includes dailymotion.com, livetv.ru, ustream, and comedycentral sites including colbertnation.com and thedailyshow.com.
Some sites that do work are youtube, and vimeo.

I use Iceweasel 4 and Chromium 13 on LMDE Xfce 64bit. I use the mint-flashplugin-x64, which has not been updated since I installed the OS, and I have tried switching it for the flashplugin-nonfree library with no luck.

Any suggestions as to what is causing this?

[JimmyMutant]

any log info? try clearing flash cache, it can get quite hefty sometimes

[MrPink]

I don't have any flash cache. I used this little trick to get rid of it: viewtopic.php?f=58&t=31722#p388194
Unfortunately it also removes ~/.macromedia/Flash_Player/Logs/flashlog.txt

This sounds like the same problem: viewtopic.php?f=141&t=74484