Since 1.7.0 is now the recent release, you might want to consider creating a second support forum for older versions of Roster. That way, the main support forum would contain only problems/fixes for the most recent version of Roster.

We don't officially support anything lower than roster 1.7.0

If you do have a problem with an older version, make sure you put the version number in your post, and someone might be able to help you