In 0.8.6-3wheezy2 it looks like the regex for _apache_error_client in the
apache-common.conf isn't working any more.
We had the same problem in another filter-file by including the
apache-common.conf.
The following regex fixed the problem:
_apache_error_client = \[\] \[(:?error|\S+:\S+)\] \[client <HOST>(:\d{1,5})?\]
Cheers,
Guido
