Two questions...
1) When is there going to be an update to the firmware for the Pioneer SB2?
2) I've noticed others that are having trouble with one their jog wheels getting stuck while using Serato DJ. the problem seems to start when using the jog wheels for scratching or just using them in general.. after a while one of the jog wheels (normally the right one) won't respond anymore. the right deck will no longer play when the play button is pressed... however if you use the mouse to move the wave on serato the deck will play again and will STOP as soon as you touch the jog wheel again. I'm thinking this could be a issue that will be fix in the firmware update.
I've heard people mention using different USB ports or even USB cables but I'm more of the thinking that.. those aren't the problems as multiple people are having the same issue and have tested with different USB ports and cables.