I had the same problem, and with no idea what to do ran:

nano /var/lib/apt/lists/repository.maemo.org_extras_dists_diablo_non-free_binary-armel_Packages

The Depends field was empty for easy-deb-chroot, so i just filled it with libc6, the first thing that came to my head (after making a backup of the file) and from then on apt-get worked. However, every time i reloaded packages from the application manager, the same error would begin to occur, and after checking the file, the depends field would be empty again. Any ideas?