We have recently noticed that after upgrading to 3.1.2.1 on AIX and NT
platforms, more versions of changed files are kept than the parameters in
the ACTIVE copygroups stipulate.

For example:

If policies are set so that:

3 copies are kept if the data exists
1 copy is kept if the data is deleted

If a file then changes and is backed up 5 times, 5 copies are kept! Even if
the data is then deleted from the client and another backup is performed. We
have also run expire inventory with no change.

Has anyone else out there found this?

The time based expiration for these versions still seems to work ok.