After getting plenty of feedback for the plugin API  which was published
in version 0.3-beta we now released an almost-ready-to-hit-the-road version
of RoundCube. The reason why this not yet a stable release are some
pervasive changes on the IMAP backend in order to improve performance. See
Changelog  for details
We'd like our dear users to extensively test this release candidate and
submit errors to our bug tracker . The 0.3-stable release will follow
You can get 0.3-RC1 from the download section of our website .