Hello, I'm also having same troubles with getting trac-mercurial working with trac on ubuntu oneiric. It seems 0.11 versions of mercurial plugin have incompatibilities with 0.12 version of trac supplied in oneiric. As noted above it seems there are several fixes in upstream to make trac-mecurial 0.11 compatible with trac 0.12.
Hello, I'm also having same troubles with getting trac-mercurial working with trac on ubuntu oneiric. It seems 0.11 versions of mercurial plugin have incompatibilities with 0.12 version of trac supplied in oneiric. As noted above it seems there are several fixes in upstream to make trac-mecurial 0.11 compatible with trac 0.12.