If you insert a copied non-formatted text into a headline-formatted paragraph, the formatting switches back to "normal". If you then try to switch back to "Headline 1" the change is at first not applied and then applied but not shown in the editor. That will cause confusion for users of the Rich Text Editor, although it is a minor bug.
See this video for a demonstration of the problem:
I don't know what causes it, but I'm fairly confident it's nothing to do with our code. Please check if TMCE on their website has the same problem.
-- CrawfordCurrie - 24 May 2009
It works fine for me. Can anybody confirm the bug?
-- SvenHess - 23 Jul 2009
There have been lots of fixes in TinyMCE relating to both heading formatting and pasting. I cannot replicate, and submitter is not responding. Closing.
-- PaulHarvey - 21 Oct 2009