Hello, I have an issue and I was wondering if anybody could help me out. I have a few users where I work that when trying to play videos on Youtube in Firefox, they will stall after about 15 seconds. This happens on all of our Mac OS X 10.5 and 10.6 machines, but NOT on our 10.4 machines. I've looked at network settings on all machines. I've seen no differences. This happens on all versions of Firefox that are installed (old versions and new). Please help.