I had the exact same problems with Macromedia Studio MX 2004 on our G5 at work. This seems to be a well documented issue on Macromedia Forums as well as on MacFixIt. The way I fixed it on my PowerBook was to reinstall the entire Macromedia Suite. I will get to that later, I do not have time to do that now. Getting Quark 6 and Quark License Administrator working again was actually not that hard. And for the second time in a row I got nice tech. support from Quark! This is amazing, as even their sales staff has a history of being nasty on the phone. Yea, we finally got Quark 6 in. It only took them 3 days after I called them back. I ordered it a good 2 months ago, and wondered where the hell it was. When I called back the sales person said our order was in as a quote and not an actual purchase. Morons. I guess they do not want our money. I will never understand that company. But like I said I have gotten good tech. support the last two times I called (both related to Quark License Administrator.) Quark 6 comes with no printed manuals, just like Macromedia Studio MX 2004. What the heck is going on here? What happened to printed manuals? I'm sorry but I burn my eye balls out enough as it is, I prefer to look at a physical book when I want help with my software. After upgrading to Panther, I had to reinstall QuarkXPress Components, which resides in the "For System" folder in the Quark 6 folder. These are shared library files. Interestingly enough this is the exact same problem with Palm syncing. Quark License Administrator works in Panther no problems. I just had to re-add it to the startup items. Since it has taken Quark 2+ years to get a Mac OS X version out it is nice that it actually works in Panther.