SiteBuilder and Warwick Blogs use various Flash players in order to play multimedia e.g. MP3 audio, FLV videos. The most recent version of the Adobe Flash Player (184.108.40.206) has a bug that is causing all of these players to break. Technical details of this bug from Adobe can be found here.
As this was a minor Flash Player update most users will not have the affected version (220.127.116.11 for example works fine). We hope that Adobe will release an update to the player soon to fix the problem.
If you are experiencing problems playing multimedia in SiteBuilder or Blogs, try going to this page and see which version you have installed. If it is 18.104.22.168 you can install the previous version using the links below, which should fix the problem.