I seem to have lost about 100 rep overnight on SO and I'm not entirely sure why. [http://stackoverflow.com/users/134754/rob-levine]
I had hit my rep cap limit, but when I look again this morning, I've lost rep (somewhere around 100) and my tally for yesterday is now below the rep limit at 175.
If I look at the breakdown of rep from yesterday, I see that for one question (3228735) I am only showing 50 rep, even though I had 9 upvotes.
I'm not overly bothered about the rep. but am interested to know why this has happened.
One thing that may have a bearing on this, is that a work colleague of mine came across my SO account yesterday and upvoted several questions, as I did to him when I got his SO account [this wasn't a blind "upvote everything"; I read his answers and only upvoted the ones I knew to be correct].
Could this be the cause?
Is this considered bad form or abuse of the rep system?