[EricH]

The rules say nothing about this situation, but...

I would assume, until further official notice, that you can't. After all, if you can break it while moving into playing configuration, then you could probably break it in playing configuration. Better safe than sorry.

Edit: Vikesrock, the relevant rule here is <R16>. <R16> says nothing about transitions into playing configuration, but I would assume those are also covered.