I'm considering an upgrade to Tiger, but my principal fear is that it will render my M-audio Revolution 7.1 (PCI audio card) inoperable. Some preliminary reports on xlr8yourmac.com indicate that there are indeed problems with the Revolution and Tiger. Currently there are no drivers specifically for Tiger on M-audio's website, which makes me even more nervous. I'd like some first hand reports if anyone has any experience with this card and Tiger. Thanks, Eric Volker ebv1 at charter.net