First one(good quirk, lol), you should test your system stability overnight running something after you overclock, especialy with ram as it can cause HDD corruption on some systems. Wouldn't want Bryce to fail in the middle of a 12 hour render.

Second, this sounds scary, can anyone else confirm? 

Agree with third, you do have to be carefull of moving objects and/or clicking in the window or something will shift, even after you switch views etc... I try to lock everything Im not using, but in a complex model this can be a problem.

Fourth, I did read something on DAZ forums and here about that, but I thought it got fixed in B6... Maybe 6.1 update.