I've been seeing this for a few days on the mail compose window; now that we have "blank window" for the editor, I'm seeing it there too: On a blank editor window, or the mail compose window, click in the window, then type a couple of characters. On the first character typed, nothing gets inserted but the caret (which previously wasn't there) starts blinking; from the second character on everything works normally. Apparently only a problem on unix?

Need to at least look at whether this can be fixed for M6.

That's append when your start typing inside the editor before editor is done loading the real body page. We need to be able to lock everything until ender is ready.

Found it -- an nsresult was being checked but we were in an if clause where it wasn't ever being set. cc'ing bruce in case he may have seen this as a purify error in the mail compose window.

verified in 5/20 build.