I am installing (or trying to!) Trinity on a fresh minimal install of Squeeze.  
But I have run into problems (which I did not the other day on a full 
install).

I have edited my sources.list as instructed on the Pearson website, and have 
checked and rechecked the repositories.  They seem to be fine, but when I do 
<aptitude update> I get a lot of error messages like this one:

[ ERR] Reading package lists
E:  Encountered a section with no Package: header
E: Problem with 
MergeList /var/lib/apt/lists/ppa.quickbuild.pearsoncomputing.net_trinity_trinity_debian_dists_squeeze_main_i18n_Translation-en
E: The package lists or status file could not be parsed or opened.
E: Couldn't rebuild package cache

And obviously couldn't install Trinity either, with similar errors.  I am 
completely baffled.  Can anyone throw light on this?

Lisi