HP LaserJet P1006 drivers for OS X here. As with many other drivers, it lists 10.5 as the highest supported version but it may work.
Hit my first major snag. I've been able to configure Mail to receive mail from my Exchange server, but it cannot send mail via the same. The IT group that handles our account said that they are having the same problem with a number of corporate clients. Apparently (or at least according to them), the communication between Snow Leopard/Mail and IMAP servers seems to work well but it isn't fully compatible with POP or other servers. They said I should just wait for Apple to publish an upgrade or patch. Kind of a bummer....
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I would like to share my opinion on 10.6. I'm a college student, so i can't afford for things to crash and such, and i wasn't too happy that 10.5.8 was considerably slow on my Mac. So i went out and got 10.6, installed it in 45mins, and i noticed a huge speed increase in startup. Now, instead of it taking 2 minutes to load everything, it now takes 20-45 seconds. I'm very happy in terms of that. But now that i have had it for a few days, i'm noticing many of my programs are crashing. So far, Visual hub is giving me applescript errors and i can't convert video anymore, Photoshop and Illustrator have crashed and i lost my work, Speed downloader, Candybar, Mainmenu, Toast Titanium 10, and Stuffit have all crashed on me thus far. The software for my Logitech mouse is also malfunctioning on me, which i really need the use of some of those buttons for my daily work. I'm honestly considering going back to 10.5.
Sounds like being an early adopter probably wasn't the best choice for you. Many of the software packages you mention are not Snow Leopard compatible yet, but will be eventually (aside from Visualhub which is no longer under development).
This is one of the reasons I got up on my sandbox about SuperDuper backups in the other threads about prepping for Snow Leopard. We saw a lot of the same kinds of comments when Leopard came out.
My advice to you is that if you have no tolerance for problems following an OS upgrade, wait until the first 2 major revisions come out before upgrading. That usually gives the developers time to get up to speed and also Apple to sort out the problems noted by early adopters.
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