Alright folks, it's been a whole day with Vista SP1, and like any OS release, reaction is mixed -- although we're certain the people with problems are being more vocal than the rest. As you'd expect, major complaints seem to center around driver issues, that perpetual thorn in Vista's side -- sound cards seem to be the major problem, although there are also reports that NVIDIA drivers are being finicky. For what it's worth, Windows Update won't offer SP1 to anyone running what Microsoft calls "problematic drivers," until they're updated, but that includes several machines sold with Vista pre-installed, which is causing some confusion. In addition, older versions of security software like BitDefender AV and Zone Alarm are flat-out blocked from running on SP1, but updates are apparently available. Obviously that's a lot of chatter, so we figured we'd ask the experts -- how'd it go? Any speed-ups or slow-downs to report? All your drivers and apps still working? Let us know in comments!