0.8.x, 0.9

• Full Thunderbird 2.0 compatibility (bug 16853)
• Modernized options window utilizing <prefpane> (bug 16376)
• Correct compatibility problems with Spell-As-You-Type (bug 12881), Lightning (bug 13489), Auto-Rewrap (bug 11572)
• Quoting of foreign character sets (bug 12750)
• Configurable cursor placement (bug 12794)

1.0 & beyond

• More quote string options: individual date components (bug 16344)
• More reply options: reply to list (bug 11570), reply in same format (bug 11944)
• Reply templates (bug 12990)