First, the Archive and Install procedure seems to be failing on PPC-based machines, which is a biggie. The second issue wasn't clearly defined, but involves users with HP printers connected to their Macs (as well as users upgrading from a Tiger install that included an HP printer). At this point, Apple is suggesting developers do a custom install that excludes the HP drivers. That sounds like a pain to me, but I'm sure it will be fixed before October.
One final note: It looks like Leopard's iCal dock icon displays the proper date at all times! The dozen or so people who have clamored for this may rejoice.
[Via Infinite Loop]