apt-get update:"Dynamic MMap ran out of room"

[Jochen Demuth <jd74s@gmx-topmail.de>]

Hi, I have a problem with apt-get update.

When I only use stable sources everything is fine. But when I put stable 
and testing sources in my sources.list, then I get this error at the end 
of apt-get update:

Fetched 4329kB in 48s (89.4kB/s)
Reading Package Lists... Error!
E: Dynamic MMap ran out of room
E: Error occured while processing scsiadd (NewFileVer1)
E: Problem with MergeList 
/var/lib/apt/lists/ftp.stw-bonn.de_pub_mirror_debian_dists_testing_main_binary-i386_Packages
E: The package lists or status file could not be parsed or opened.

I added this line to apt.conf, as suggested in 
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=166758

APT::Cache-Limit=16777216;

But with the same result.

Any ideas?

Thank you
Jochen

PS: this is my sources.list:

deb ftp://ftp.uni-erlangen.de/pub/Linux/debian/ stable main non-free contrib
deb-src ftp://ftp.uni-erlangen.de/pub/Linux/debian/ stable main non-free 
contrib
deb http://non-us.debian.org/debian-non-US stable/non-US main contrib 
non-free
deb-src http://non-us.debian.org/debian-non-US stable/non-US main 
contrib non-free

deb ftp://ftp.stw-bonn.de/pub/mirror/debian/ testing main non-free contrib
deb-src ftp://ftp.stw-bonn.de/pub/mirror/debian/ testing main non-free 
contrib
deb http://non-us.debian.org/debian-non-US testing/non-US main contrib 
non-free
deb-src http://non-us.debian.org/debian-non-US testing/non-US main 
contrib non-free

deb http://security.debian.org/ stable/updates main contrib non-free