I think the Archbishop Communist collaboration story in Poland is a SHAM

Colleagues in Poland have informed me the Wielgus was a conservative and the proposed successor is a liberal. Moreover, the records compilation was done by anti-Catholic communist bigots who would have liked nothing more than to defame with corrupt records. Now the records are being pointed to by the same old communists and their new anti-Catholic collaborators.

Here's the best round-up I've found so far on the topic by Sandro Magister in Rome.