I have used each beta and have only had network issues with one or two of them. I recently downloaded the RC. I uninstalled the previous version and did a clean install. After launching the RC I can not get an internet connection. I have a 1.83 Ghz iMac and am running 10.4.6, Windows XP SP2 in Parallels, and am connected wirelessly. I've gone back and forth between the parallel and realtek driver and neither have worked. I also have problems with the RC upon restarting where it said Parallels could not be launched. The only solution was to reinstall. To top it off my requests to Parallels tech service have gone unanswered. I've been waiting for the RC to come out to pay the $40 since when this program works it is really nice, but it seems Parallels is not interested in my money.