I upgraded my MacBookPro 15", MacPro 8-core and my daughter's MacBook to Leopard the night it was released. The Archive and Install upgrades went well, but I started have finder problems randomly with my MacBookPro and MacPro. My daughter's MacBook was fine, but then she is not as discriminating as me.
Ultimately, I ended up doing a clean install on the MacBookPro and MacPro. I reinstalled my apps including Parallels/Windows XP Pro that I need for my financial planning practice to run Windows only apps. All is working well now, particularly after doing the Apple OS 10.5.1 upgrade (recommended by my Apple guy to download the upgrade from Apple's web site and install instead of letting the automatic upgrade feature install).
I use PS CS3 and LR 1.3.1 on both machines. The heavy lifting for photo, video and printing to my Epson R2400 is done all on my MacPro. I use PK Sharpener and Nik Photo Efex Pro. I had to upgrade the Nik software to 3.0 because the version 2.0 installer would not load in Leopard. No problem with the latest download of PKS. I use ImagePrint RIP v7.0 to print to my Epson R2400 and I had no problems with that.
I have 4 drives in my MacPro: 1TB (system and Mac Home folders), 2x750GB in soft-RAID 0 for 1.5TB (all of my images and video), and 750GB w/ 2 partitions, one for a 100GB scratch disk and the other for SuperDuper backup of my system drive. I use a Lacie Bigger Disk Extreme 1.2TB connected via FW800 to backup my photos, videos and for Time Machine backups of my system drive.
It all works very well at the moment. The 8-core is much peppier with the new OS. I'm hoping that PS and LR will release 64 bit versions soon and then it should really rip.
The only remaining problem I have is that the Eizo software to calibrate my ColorEdge CE240W monitor does not work in Leopard. I saved my monitor profile created in Tiger and manually installed it after the clean OS install. Eizo says that they should have Leopard compatible calibration software available in January. Fortunately, the Eizo does not have to be calibrated very often.
A really cool feature of Leopard that I'm finding useful is the Screen Sharing availble through my local network and remotely via my .Mac account. I run apps and access files on my remote Macs in either direction. Very cool!
Merry Christmas!
Bud James
North Wales, PA