well, the error is in the language file and it's more generic. ie: it doesn't distinguish between the checkbox and the post count..
they are taken as a combo bombo enable.. if checked AND postcount then bada bing... else bummer..
sooooo, you could edit the lang file to say..
"dude, either sending pm's are totally disabled for your sorry arse or you need some more posties.. either way, you're shut down (for now)"
:2c: