Further to fox in sox's posting, here's another small one to consider. Any comments?
Often I have found that just as we are about to level off (say within 200'), when our SOP's dictate that BOTH pilots are monitoring to ensure no level bust, ATC will give us an instruction to change to the next frequency. PNF usually then waits for PF to level off then gets on with the radio call.
Never the less this must up the chance of a level bust whether you are hand flying or on auto with maybe the wrong altsel.
Could possibly be one of things that ATC are not aware of because nobody has brought it to there attention.