Currently Being ModeratedMay 1, 2012 9:19 AM (in response to Sam Beaver)
For software compatibilty see http://snowleopard.wikidot.com/ and http://www.macintouch.com/specialreports/snowleopard/slcompat.html
Currently Being ModeratedMay 1, 2012 10:20 AM (in response to Sam Beaver)
Scanner drivers are the most likely to be broken. Check with the vendor if updates are available (less likely if more than a couple of years old - or even 1 year in the case of HP)
If not check Support Downloads for updates. Apple have issued updates for most makes in the last 6 months, in fact there's a new one for HP on the site now.
Otherwise (once you've checked the links BGreg supplied) installation is usually straightforward. There's only one install option and that replaces system files only, without affecting your data or applications or preference settings.
(always wise to back up first of course in case of surprises/finger trouble)
If you have PPC applications still (like AppleWorks), ensure you select Rosetta in the installations. It's there by default in Leopard, but you need to select it in SL.
Currently Being ModeratedMay 1, 2012 12:01 PM (in response to Sam Beaver)
most everything went over well this time once deleted some .kext and .plist files.
with one exception: fonts in indesign 5. font management different at the OS level now?
Currently Being ModeratedMay 1, 2012 2:02 PM (in response to Sam Beaver)
Fonts are a whole different ball game, and can cause major problems, or worse, minor niggling ones that are hard to pin down.
Best I can do there is refer to you Kurt Lang's article "Font Management in OS X"
Currently Being ModeratedMay 3, 2012 2:04 PM (in response to Sam Beaver)
had to start over and reformat the drive again.