On 03/11/2011 03:19 PM, Webmail Author wrote: > There shouldn't be any big changes between TB3.1 and TB3.3 that would > break the Webmail extension (4.0 is another matter), my guess is this > a bug in that build of Thunderbird.
That's not true; TB 3.3 uses the same version of Gecko that FF4 uses, so I suspect there will be significant breakage. See: https://developer.mozilla.org/en/Thunderbird_3.3_for_developers, and https://developer.mozilla.org/en/Extensions/Updating_extensions_for_Firefox_4.
