iLeopard Mail has been my favorite Thunderbird theme for a long time. Recently, I upgraded to Thunderbird 3.1 and I found that this theme is no longer available. Since I cannot find any theme that is similar to iLeopard Mail, I decide to upgrade the theme and make it compatible with Thunderbird 3.1.
Here is the instructions on how to make iLeopard Mail compatible with Thunderbird 3.1:
1. Click here to download iLeopard Mail for Thunderbird 3.1
2. Open Thunderbird
5. Select the file you just downloaded, i.e., ileopard_mail-3.2.4-tb.jar