Problem with FF6 Rated 5 out of 5 stars

I've been using Web Developer for years, numerous times a day, every day.

However, I've noticed that since upgrading to Firefox 6, there's a problem: the normal Windows shortcuts for copy and paste, ctrl-c and ctrl-v, are doing what Web Developer is set to do for shift-ctrl-c and shift-ctrl-v. That is, if I try to copy text from a web page, I get the page's cascading style sheet. If I try to paste, I get the HTML validation tool. If I disable the extension, everything goes back to normal.

This review is for a previous version of the add-on (1.1.9.1-signed).