got stuck in dpkg-available-cache

[Bjoern Rueffer <rueffer@math.uni-bremen.de>]

Hey guys

I use my laptop in two different countries, UK and DE, and so I chose to
have different sources.list files in /etc/apt/. I also played around with
other sources for KDE 3 and other stuff.

Now the problem is that when I recently changed something in sources.list
and now select something new in dselect, dselect tries to download
versions, that are currently not available. Even worse dselect also tries
to update packages that are assumed to be outdated. Same holds for
apt-get (when upgrading).

I always get sth. like
Get:15 ftp://ftp.linux.co.uk sid/main apt-howto-en 1.8.3-2 [230kB]
Err ftp://ftp.linux.co.uk sid/main apt-howto-en 1.8.3-2
  Unable to fetch file, server said
'/pub/debian/pool/main/a/apt-howto/apt-howto-en_1.8.3-2_all.deb: No such
file or directory  '

I tried the following
dpkg --forget-old-unavail
dpkg --clear-avail

but it didn't have the result as hoped for.

How do I clear this available-cache with the version numbers in it? I'm
using sid if anyone thinks that matters.

Thanks in advance

Bjoern