There's clearly a mismatch between the Trac version (0.12) and the version of this plugin (0.11) in the Ubuntu repos.
Manually installing plugin version 0.12 from http://trac.edgewall.org/wiki/TracMercurial works for me.
There's clearly a mismatch between the Trac version (0.12) and the version of this plugin (0.11) in the Ubuntu repos.
Manually installing plugin version 0.12 from http:// trac.edgewall. org/wiki/ TracMercurial works for me.