Sirius Radio's web-based player is helpful when there is interference with Sirius' satellite signal, as in the case of a recent client who listens to the Metropolitan opera through Sirius' web-based player. However, a recent OSX update appeared to break Sirius' web-player.
The truth is that Sirius' player uses Windows Media Player as its base, and OSX tends to favor Apple's native Quicktime player. Apple corrected the problems in a Quicktime update, and once we were completely up-to-date with all of 10.3.9's updates, including Quicktime and Safari, we were able to load Sirius' web-based player in Safari.
Apple is on the move, refining OSX with regular updates. Running an OSX prior to 10.3.9 may mean a loss of functionality. If you have OSX 10.3.9 I recommend running all of your updates.
