What about people who had just as much slowdown/etc. with Java 1.4.2, before Java 1.5 came out? Unreg-whatever has been posting here for donkey's years complaining intermittently of slowdowns and the like. Since version 3 something!
Is that the nvidia thing? If it is, going back to 1.4.2 won't do any good if it was just as bad before 1.5 ever came out...