Copy/Paste into a new compose email does not work

I can't copy and paste into a new email. If I choose the "Plain text" option I can paste, but as soon as I change back to HTML the text disappears. This has been going on now for 3 days. I have notified Tier 2 Cox support who confirmed with a test in various browsers that pasting is not working. This seems like an important feature. Anyone else having this problem?