I would make that 6 votes. If half a dozen people can't even bother to vote for a pict then it's not worth postinjg to your front page. It would also limit the effects of voting shenannigans although it hasn't been that bad this week.
I agree actually, I intended this picture to go into the following POTW, thinking that the last one had finished, so I think that gav_davies butterfly picture should be this week's picture of the week. Perhaps another alternative would be to zero any ratings if a picture is moved into the POTW category, so that only subsequent ratings are taken into account. Apologies for any problems inadvertently caused, I agree it appears unfair.