How many times has someone on your friends list posted about something and you were really confused, but you didn't want to ask because you knew you SHOULD know? How many times have you felt 'guilty' asking a close LJ friend a question that should be 'obvious'?
Stupid guilt. It's maybe inevitable, but I think encouraging asking "By the way, what did you mean about...?" is good. It's the best way of finding out interesting things about me, especially things I wouldn't *write* a post about :) But there are *other* reasons for not asking, such as not wanting to be impolite, or to intrude, or not getting round to it.
If you've missed a few things, missed an entry and are confused, ask me any thing. Even something EXTREMELY basic, like where I live! I'm not allowed to get even slightly irritated at any of the questions - we've all missed things before. In turn, you may repost this in your own journal. ;)