[imp] Sent-mail not stored, Can't add folder => Alpha version

[Matts]

At this moment I have updates the c-client to be sure, this makes no
difference.

I have seen that I can add a subfolder using Thunderbird and remove it
with IMP or DIMP.

The problem is still adding a subfolder using IMP/DIMP, this still doesn't
work.

There are no strange PHP modules loaded.

Are there still some options left ?