apt-get errors

["Patrick L. McGillan" <pmcgillan@pateri.com>]

Hi,
I can't seem to upgrade one of my machines. When running apt-get upgrade, I 
get the following error. Can't seem to get past it, so am appealing to a 
higher order for help.

Preconfiguring packages ...
(Reading database ... dpkg: error processing 
/var/cache/apt/archives/gzip_1.3.2-3woody1_i386.deb (--unpack):
 files list file for package `at' contains empty filename
Errors were encountered while processing:
 /var/cache/apt/archives/gzip_1.3.2-3woody1_i386.deb
Processing was halted because there were too many errors.
E: Sub-process /usr/bin/dpkg returned an error code (1)

I even tried to download and istall at with this command,  
dpkg -i at_3.1.8-11_i386.deb, but get this error back also;
(Reading database ... dpkg: error processing at_3.1.8-11_i386.deb (--install):
 files list file for package `at' contains empty filename
Errors were encountered while processing:
 at_3.1.8-11_i386.deb
Processing was halted because there were too many errors.

I don't get it, I've tried purging things and restarting with apt-get update 
& apt-get upgrade, but I always run into the same road block.

Patrick