New version hangs FF when moving tabs around Rated 5 out of 5 stars

Have been using this addon for years. Best addon to FF!

Since the latest version (0.14.2013082201/0.14.2013082301), FF hangs sometimes when moving tabs around (i.e. newly created tab groups). Get a FF popup asking if I want to stop an unresponsive script. At this stage FF completely unresponsive and you cannot click on anything. Need to kill the process.

Please fix this issue. Going back to 0.14.2013052901 in the meantime

This review is for a previous version of the add-on (0.14.2013082301.1-signed).