I switched the "close" and "minimize" button from the bottom menu on my theme so that "close" (from menu) and "minimize" (upper right corner) are both quickly reachable.
I know closing PCM will lose pictures in contacts list and sms (I don't care too much), but I like to have less applications as possible running at the same time: I have to softreset too much lately.
I hope Microsoft will one day make an OS with no problems (or self-solving problems)...