what I have seen so far (OS X) is two guys with G5 and one guy with an intel imac coming forward with probs.  nobody with a G4 or mac pro has mentioned anything yet AFAIK. even if they've got a G5 on which to test SR1 and 2, there are dozens of OS X-related features that they may not be able to duplicate.  but since they sell stuffit, it seems likely that they have a room full of pre-intel machines.