Rated 5 out of 5 stars

Because of the backout of bug 275871 the single shortkey "G" is removed from Thunderbird 3. Please, update your wonderful extension for Thunderbird 3 compatibility.

This review is for a previous version of the add-on (0.5). 

I already updated my add-on and released version 0.5. It's still in the sandbox, but I hope it will be available for everyone in a few days.