Listing of Identical addressbook

[Igocor]

In my Thunderbird 5.0 its always a question where (new) contact are listed.
In the settings-window I see one addressbook listed several times?!Many addressbooks.jpg
Analysis?
How to debug?

thnx
Igo C>

[Igocor]

Screendump to illustrate multiple addressbook question

Sorry, my screendump didn't travel along with myt addressbook-question
Many addressbooks.jpg