i did find a solution. think it was the second post of this:
http://ubuntuforums.org/showthread.php?t=1841228

basically - remove cached package lists with: then download new package location lists with:

just wondered why RASPBIAN is such a large file size ? compared to a full desktop OS, for example if i had to guess, i'd have thought it would be significantly smaller, considering the raspberry pi is quite a low power device or is it simply that no one felt the need to optimise it for file size as ...

me too