Supported versions of Roundcube - rc2 does not work

Initially tried with roundcube rc2. This gave a blank page and I found various database connection error reports. As rc2 is fairly recent and is significantly different to rc1 I am not entirely surprised with this result.

I then downloaded rc1 (1.1 version) this hit the unable to login problem described in other support requests. Looking at documentation there is no obvious indication (and I may be missing something here) of which versions of roundcube have been found to work with the module and no documented fix to the login issue. So for the moment I am not going to explore this further. But the above information would be useful for others.

This module has promise and I would like to make use of it. Currently I cant.