i have a 15" 800 mhz flat panel imac with a superdrive, and ever since i upgraded to 10.2.4 i can only burn dvd-r media at 1x and cd-r media at 4x - before the upgrade i was burning at 2x and 8x, respectively. i haven't made a media switch, either - i'm using media off of the same exact spindles i was using before the upgrade. this happens with toast 5.2, itunes 3.0.1, and disk copy so i don't think its an application issue. any ideas? i'm baffled!