Address book in Felamimail is broken!

I’ve upgraded my Egroupware 1.4.004 install to 1.6.001 and noticed that when I compose an email message in Felamimail and want to add recipients, the address book opens, it says “showing 1-5 of 730” whatever, but actually it doesnt show anything, there is no list of contacts to select from :frowning:
When using the addressbook separately it works just fine, but in felamimail it displays no contacts.
How can I fix this?
I tried addressbook and felamimail svn, but no improvement there :frowning: