I've been thinking about this. I can see how using an old preset can mess with the device. If you ever look at those preset files in an editor you can see and edit the various options yourself. So, if the old preset doesn't have the line of code for the pre-roll, then the machine will get confused. This may extend out to any of the features added in 3.0. Last night I updated to 3.0. But, when I tried to change the pre-roll (on an old preset) the option wasn't there. Maybe because that old preset didn't have the code to change... Just a thought and not a very elegant way of trying to describe the issue. I'll re-build my favorite presets and test again.