I went to my Mac store yesterday evening and eagerly waited in line with the throngs of sheep waiting for a taste of Mac's new OS Koolaid. I then hurried home and installed Leopard onto my new iMac (about 4 months old). The upgrade went smoothly. It was a slow and boring 2 hour process, but all went fine. Then I attempted to (upgrade?) my new MacBook (about 5 months old). The install on my MacBook was virtually impossible! The screen went completely screwy! For no apparent reason the screen resolution changed as soon as the OSX disc rebooted the system during the initial setup. The display size of the screen was now HUGE and a large portion of the dialog was now out of the viewing area. So the majority of the information on the computer screen was no longer viewable. In addition to the bizarre screen resize issue, the entire display appeared to be overtaken by a demon whenever I moved the mouse. The entire screen started scrolling sideways in a wild manner whenever I would move the mouse even slightly. So how would I be able to install the software? No mouse control! And no way to even see the entire screen! And worst of all - there was no way to recover my MacBook by doing a restart either! I eventually figured out how to TAB through the dialogs to populate fields that were not viewable since I could not see most of the computer screen. I then experimented by pressing the tab button a number of times to select (hopefully) the correct field, and then I would press the space bar to confirm my selection. After a lot of trial and error I eventually managed to mash out the correct sequence of invisible options and I somehow got the software to load. Hold the phone. The installation curse was not over yet. Once I finally got the MacBook running again, I discovered that Parallels would not work on either machine. I eventually had to do an uninstall of Parallels on each machine, and then I did a reinstall on each machine to get Parallels to play with Leopard. After a lot of SERIOUS frustration, both machines now appear to be working fine. I have to say I am really unimpressed with the way that my 2 NEW Mac computers responded to this system upgrade. I'm a new Mac user, and up till now I have liked the whole Mac experience, but this was unbelievable! I have worked with MS Windows ever since version 3.0, so I've performed my share of system upgrades, and I can honestly say that this upgrade was the most disastrous computer upgrade I've ever experienced! Thanks Mac!