How to fix flash player to work on any browser
Update: Opera 9.50 seems to solve this problem. Check your version and update if needed.
After a serious vulnerability had been discovered in Acrobat Reader for PDF, one of the leading products from Adobe now becoming a standard, which affected all browsers now the online video format they are also trying to introduce as a standard doesn't work with some browsers. You can check that Flash plugin for Linux (it seems that also affects Windows) doesn't play FLV video with Opera (you can also find cases with Firefox or Konqueror).