Tarmac 0.4, codenamed "Dog Problems," has been released. This release fixes many bugs that existing in Tarmac 0.3 merely because Tarmac 0.3 was a complete re-write of Tarmac. All the plugins have now been updated to work properly. The commit message formatter plugin has been extended to take more options (see the documentation). Tarmac 0.4 also brings a new plugin for enforcing rules on voting, i.e. adding the ability to say "reviews must have two approve votes."
A special thanks goes to Rodney Dawes for working through lots of hiccups in 0.3 and getting Tarmac up to snuff for Ubuntu One to use regularly.
You can download the tarball or wait for the ppa to build the new package.