I was posting an article for future post in WP 2.5 then once I saved it, the WYSIWYG function stopped working. All of the text was in HTML, even though the visual button was still available. I clicked the visual button and it was still in HTML.
My user profile is checked to post with the visual editor. I unchecked it, saved it, then checked it back, still nothing. I haven't uploaded any new plugins recently and wasn't messing with anything else other than posting a future post.
I've tried to look and see if I can disable the plugin and get something else, but it appears that this plugin is built into the system. I'm at a loss.