Okay, it's been several days and it's still burning dvds just fine so I'll mark this post as solved. However, one thing is acting funny: every now and then a bubble pops up from my icon tray saying that I have files waiting to be burned, which I don't. When I click on the bubble a blank window pops up and it asks me to insert a dvd (it does this even if it already has a dvd in it). So it's still messed up for God knows what reason, but at least it burns.