apt problem

hi

i did a fresh debian unstable installation. then i added a debian-multimedia
mirror to my sources.list and did an apt-get update.
then the following message appears (also with an other mirror):

...
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/debian-multimedia.informatik.uni-
erlangen.de_debian-multimedia_dists_sid_main_i18n_Translation-de
.....

best regards

gilde