Java applet sounds in browser(s)

Got openSuSE 11.0 installed, running well (32-bit) and started off with Java app sounds working in the browsers (FF, Konq, Opera). Was having a bit of trouble with RealPlay 10.0 streams stopping for no apparent reason so I upgraded to 11.0 and it works fine now. However, when I changed some sound and video associations (yeah, I know…DOH!) to add RealPlay 11, the java app sounds will no longer play in games and such. What are the extensions for this type (Java) so I can try to get it working again? Thanks!