Description of problem: I'm trying to report a piece of spam I got, so I do ctrl-u to get the source, ctrl-a to select all, ctrl-c to copy. Close that windor and then open a new message. Paste with ctrl-v above my signature, then go up and enter "abuse" in the To: field, hit enter to advance and at this point thunderbird freezes while spellchecking the message. "abuse" is still in red. Not sure that there is an easy was for the spell checker to avoid this stuff. I guess I need to be forwarding the email as an attachment, but I need to be sure to send the full message including all headers. Also, it seems to recheck the message each time I add a new recipient, even though I haven't changed the text of the message, though I have selected text in it.
Created attachment 126583 [details] Contents of the email I'm pasting into the compose window
I'm closing this because forwarding as an attachement works and sends the full headers and avoids the spellcheck issue. I posted the bug anyways though because many web sites still instruct you to use the ctrl-u/view source method with Thunderbird.