Last week, I upgraded to a 27" mid 2011 iMac. 3.4 i7 quad, 8gb RAM, AMD Radeon 6970m 2048mb. Came pre-loaded with Lion; it's updated to 10.7.3 (11D50d). I'm having issues with fonts. At first I thought it was a problem with Suitcase Fusion 3; I'd install fonts, and some of them wouldn't be available in QuarkXpress 9, although Suitcase showed them as active and available. Then I saw the same fonts were missing in other programs (Word, InDesign, etc.) So I removed them from Suitcase, and installed the fonts with Fontbook. Same issues. The main font package used in the office is Adobe Type Basics Opentype edition. I converted it to a true-type collection, and the problem still occurs. Oddly, some fonts in a family will work, and others will not. I even converted them to windows TT; no luck. This same exact package is working fine on another machine running Snow Leopard. Documents created on that machine must be able to be opened on my machine, and vice-versa, without font substitutions, etc. Any possible solutions or ideas? If worse comes to worse, is this mac capable of running Snow Leopard? Thank you for your help.