sinoreen - eek, yeah - wonder how we missed that. Nice and reproducible at least.
renovator - the problem with this is that it's caused by button bouncing (accidentally tapping on the Answer button right after tapping on the button to advance to a new card), which means we'd have to explicitly pop up an error message whenever you tried to process an answer without having all of the boxes filled in, which would be incredibly irritating for people who routinely skip over cards they don't know by just tapping on the Answer button without filling anything in. So it would require yet another new profile setting option, and that unfortunately isn't going to be a possibility in 2.0.1.
daniel123 - you mean the audio dropping-out bug, right? It's starting to sound like a memory issue now, either that or some sort of driver issue with too many SD card files being open at once. Try this: exit Pleco completely (Quit command, Dict menu), then move some of the smaller data files from \\Storage Card\Pleco to \\Program Files\Pleco - does that get rid of the problem?