Update Manager broken

[Jan Schaafsma]

Dear sirs

I downloaded and installed the updates offered by the Update Manager on 
3 December 2007. Since then the Update Manager no longer loads.

I get the following error messages:

E: Problem parsing dependency Replaces
E: Error occurred while processing kexi (NewVersion1)
E: Problem with MergeList 
/var/lib/apt/lists/za.archive.ubuntu.com_ubuntu_dists_gutsy-updates_main_binary_1386_Packages
E: The package lists or status file could not be parsed or opened

How can I fix this problem and get my Update Manager back?

Regards

Jan Schaafsma