Thunderbird 3.1.2 -> ColoredDiffs

In my mail-client thunderbird I get e-mails containing the diff-output from
version control systems like subversion or mercurial.
Here I use the plugin coloreddiffs, which interprets the output and displays
a nice text format.

This plugin was not compatible with the last 3.1.x version of thunderbird,
but yesterday I checked the add-ons and now this beautiful plugin works