just found this bug filed:
http://forum.pixelpost.org/showthrea...oto=nextoldest
seems to be the same thing - i'm running v1.4.3 - but if you're aware and it's fixed in 1.5 just disregard, it's not a big deal at all.
And just to clarify - it works properly, only breaks when editing the post on the admin page.
-john