Rated 5 out of 5 stars

After upgrading to Thunderbird version 7.0, I redid George's "trick", substituting 7 (in 2.) and 7. (in 4.), and it seems to work just as well under 7.0 as under 6.0.2.
I now run Thunderbird 7.0 on Ubuntu 11.04, 64bit

Rated 5 out of 5 stars

I can confirm that George's "trick" works for my Thunderbird 6.0.2, when I substitute 6.0.2 (in 2.) and 6. (in 4.)
I run Thunderbird 6.0.2 on Ubuntu 11.04, 64bit