One thing you can say about bunnies is that they are stubborn!!!! Did she put the new hole in the "false" carpet or did she go to a different place in the new carpet to dig? On one hand it sounds like she is trying to build a nest...has she pulled out some of her fur? Then it's definitely a nesting thing going on. Other than putting carpet scraps on top of the carpet about the only other thing you can do - since bunnies DO NOT respond to corrections/punishments is to keep her confined and don't feel guilty about it (easier said than done). I've used the stand alone pet fencing which allows them to be in a larger area than a cage provides but still limits where they can go and what they can get at (mine ate a hole in the front of a new sofa). Eventually she will stop this behavior, every bun is different and she just has to get this latest tantrum out of her system. Not what you wanted to hear I'm sure. Good luck!!!