The graphics card of my Windows PC decided to give up on me tonight leaving me with a black screen that made even solving black & whites rather challenging ;)
Anyway, I switched to my Linux PC (a heavily modified Fedora 5) and the Griddlers applet worked
without any hassle. (If any Linux users would have problems with this, it's most likely a faulty integration of the Java system with the browser. That in turn can have several causes but most likely that will be a matter of rights and/or paths.)
I must say I appreciate it that the Griddlers team chose the Java platform for the application thus giving us frequently ignored Linux users 'equal opportunites' to become addicted to Griddlers.