md5 sum mismatch with latest arts deb

Hi!
Trying to update I am getting this:

Reading Package Lists... Done
Building Dependency Tree... Done
The following packages will be upgraded:
  arts kappfinder kate kcmlinuz kcontrol kcron kdat kde-cvs-snapshot kdeadmin kdeadmin-kfile-plugins kdebase
  kdebase-bin kdebase-data kdebase-kio-plugins kdelibs kdelibs-bin kdelibs-data kdelibs4 kdeprint kdesktop kdm
  kfind khelpcenter kicker klipper kmenuedit konqueror konqueror-nsplugins konsole kpackage kpager kpersonalizer
  ksmserver ksplash ksysguard ksysguardd ksysv ktip kuser kwin libarts1 libartsc0 libkonq4 libqt3c102-mt
  lilo-config secpolicy xfonts-konsole
47 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 2238B/41.9MB of archives.
After unpacking 94.2kB disk space will be freed.
Do you want to continue? [Y/n]
Get:1 http://rs.fuzz.nl unstable/ arts 1.2.0-0+cvs20040122+cm [2238B]
Fetched 2238B in 0s (6418B/s)
Failed to fetch http://rs.fuzz.nl/muesli/686/kde_head/unstable/arts_1.2.0-0+cvs20040122+cm_all.deb  MD5Sum mismatch
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Thanks for great work!

Fedor.