I am having the same problem with hanging. I have OSX 10.4.7, powerbook 1.5, 512 ram, and have a few weeks ago upgraded to Limewire Pro. The hanging problem has only come about after I downloaded Pro. I get more download options which is good, but now I only get to download for less than an hour at a time before it stops doing anything and I have to force quit it. I have rarely more than 15 downloads incompleted, maybe half that trying to download at any one time. So... why is Pro turning out to be a waste of money???