Thanks very much for the double quote hints. It worked very well. I suspect this could be what was causing d'Amphoux's problems.

I also noticed that this script doesn't work when replying to emails, is that correct? I don't see the "Use Identity" line at all when replying, even when in plain text mode.

I am somewhat new to the greasemonkey scrips, but managed to get this one working last night. 2 comments/questions:

1) As was mentioned before, the signature entry function only works when I am in plain text mode.

2) Putting quotation marks into the signature text breaks the entire macro. Is there a way to insert those that won't cause problems? What kind of html is allowed in the signature array?

Thanks for the great script!