Update: Solved --> Somehow, Flash got removed for those two browsers, Reinstalling it solved the problem.
Since I began playing Glitch many months ago, I have used several different browsers (under Windows 7). Mainly Chrome and Firefox, but also sometimes Sea Monkey and Opera. A couple of days ago, I discovered that those two (Sea Monkey and Opera) now get a blank screen when I click "Enter the world..." Chrome, Firefox, and IE (ick) continue to function.
I understand that TS may prefer to support only a limited list of browsers. However, if they've put in browser identification code and switched off some ... well, that would be rude. Is that the case?