Rated 4 out of 5 stars

by KWKW999 on Nov. 20, 2008 · permalink

A number of people have had problems with Thunderbird slowing to a crawl with this add-on installed. I had the same problem. As a temporary fix, I put all my calendars in "read-only" mode for normal use. When I need to edit, I deselect the "read-only" and edit away. A bit cumbersome, but it works for now until this add-on can mature a bit.