Originally Posted by
Ranshiin
Oh, I just realised now you use Linux. Derp.
Yeah, you need to use Sun Java (or Oracle Java as it's now known...) Unfortunately, my most recent experience with Java in Ubuntu is that Sun has deliberately broken the packages (or at least the browser plugin package), so you will have trouble getting it to work in Firefox(or what browser you do use) without some manual fiddling/Googling. I haven't yet succeeded in getting OpenJDK to work for Chat.
Teaches me for uninstalling Java last weekend, that does. Can't even play Minecraft now. -.-