unexpected EOF on client connection

Hello everybody,
Our Company get two Cluster environment with postgres 8.4.4 installed.
Both Clusters have the same  Structure (Tables, Functions, ...)
In one of them  I am recently getting many entries in the log on this type:

2010-09-20 14:21:25 CEST [31010]: [1-1] user=edarling,db=edarlingdb LOG:  unexpected EOF on client connection
2010-09-20 14:21:34 CEST [31158]: [1-1] user=edarling,db=edarlingdb LOG:  unexpected EOF on client connection
2010-09-20 14:21:42 CEST [31409]: [1-1] user=edarling,db=edarlingdb LOG:  unexpected EOF on client connection
2010-09-20 14:21:51 CEST [31492]: [1-1] user=edarling,db=edarlingdb LOG:  unexpected EOF on client connection

What really strange is, is that every  Application get connected through the Database using the Users 'edarlingapp' or edarlingadmin. The edarling user is only used for administrative purpuses .

Any idea how i could solve this issue?
Thanks in advance

-- 
Eric Ndengang
Junior Datenbankentwickler
Affinitas GmbH  |  Kohlfurter Straße 41/43  |  10999 Berlin  |  Germany
email: eric.ndengang_foyet@affinitas.de  | tel: +49.(0)30. 991 949 5 0  |  www.edarling.de
Geschäftsführer: Lukas Brosseder, David Khalil, Kai Rieke, Christian Vollmann
Eingetragen beim Amtsgericht Berlin, HRB 115958