I'm having the exact same problem as Harvestr on my Mac at work -
Every time I go back to Illustrator after using another application, like Photoshop, Quark etc. I have sit and watch the spinning rainbow wheel for about a minute. This also happens after I print from Illustrator.
Illustrator ran perfectly for the longest time, and then all of a sudden it just started doing this. I have no idea what I might have done, but I think it may have something to do with fonts, because when Illustrator is launched it takes a long time to think when it says "Reading Fonts..." But I don't recall ever messing around with my fonts or anything like that.
I have absolutely no clue how to fix this though...and everyone at my work is clueless when it comes to Macs.
I'm having NO problems with any of my other applications.
I'm currently running the latest version of Jaguar and Illustrator 10.0.3. Computer is a 450 MHz G4 with 512 MB ram - not the greatest, but everything's been perfect for me except for this problem.
Harvestr - Did you ever figure out how to fix the problem?
If I have to stare at this spinning wheel any longer I'm gonna go crazy!!!!!!!
Thanks!!!!