Just a quick note, I regularly encourage Answer acceptance and up-voting in comments on good answers and questions (however I still eeem a long way off Vox Populi [sad-face] ), however it has just been made apparent that a new user to the SE can post their first question (indeed they are encouraged too) however they can't accept an answer for 2 days!!
Sub Question, is this specific to an answer made by the OP, or is this a blanket rule for a newb, can't accept answers for 2 days or can't accept own answer for 2 days?
if it's the latter then this is a somewaht moot point, that makes sense to stop people spamming Q's & own A's for rep points.
However the former seems less intuative, especially as we have issues with answer acceptance anyway and also certainly on EE-SE we do seem to have quite a few sign up > ask question types, not a problem in itself but we should be encouraging Answer acceptance early, when a user posts their first Q, not later on, am I right?