As of yesterday, it appears I can't post to the forums from my iPad. The Message block is grayed out and nothing can be typed there.
I belong to several forums, and can post to them just like before.
I can post here from my computer with no problem, so apparently I haven't been blocked and it's an iPad specific problem with this forum.
edit: on further examination, this is only occurring with Atomic Web Browser which is my usual browser. Safari works ok. Very odd....