error message when trying to go on icedove esr-channel

[Maja-O. Lenz]

Am 02.04.2012 08:22, schrieb Mike Hommey:
> On Sun, Apr 01, 2012 at 08:51:02PM +0200, Maja-O. Lenz wrote:
>> Hi Mozilla team,
>>
>> I am using icedove 3.1.16 and wanted to change to esr-channel following
>> the guide on http://mozilla.debian.net/ for testing (Wheezy).
>> But
>> deb http://mozilla.debian.net/ able icedove-esr
>> adding to my sources.list only resulted in the following error message:
>>
>> W: Fehlschlag beim Holen von
>> http://mozilla.debian.net/dists/able/icedove-esr/binary-amd64/Packages
>> 404  Not Found
>>
>> E: Some index files failed to download. They have been ignored, or old
>> ones used instead.
>>
>> What do I have to do?
> 
> Refresh, the page had a bug.

Okay, but adding the new line
deb http://ftp.de.debian.org/debian unstable main
to my sources.list aptitude wants to upgrade many other programs, too. I
just want to use the unstable-channel for icedove. How can I prevent this?

Thanks,

Maja