email, multiple folders

Running 7.9.2 I can’t get mulitple folders visible and therefor not drag and drop or move emails to archives etc.

In the admin, email -> monitored folders:

If I click select I get an empty window, so the select box does not work in the latest version. But the previous version worked and when set to inbox only (we use our own IMAP server) it worked.
Hoever adding extra folders in a comma seperate list does not work. In the email view it refuses to display emails at all when multple are selected.

Is this just my setup or are there more people with issues like this?

Bastiaan