Mozilla/5.0 (Windows NT 5.1; rv:5.0) Gecko/20110624 Thunderbird/5.0
What Beverly Howard described in comment #20 for SeaMonkey applies also to Thunderbird.
This is not merely a Linux problem. I have this problem under Windows XP SP3. Therefore, I have changed the Platform -- both for Hardware and OS -- to All.
Mozilla/5.0 (Windows NT 5.1; rv:5.0) Gecko/20110624 Thunderbird/5.0
What Beverly Howard described in comment #20 for SeaMonkey applies also to Thunderbird.
This is not merely a Linux problem. I have this problem under Windows XP SP3. Therefore, I have changed the Platform -- both for Hardware and OS -- to All.