To follow up, the 6.1 source does not build without some help.

 There is an additional dependency from the addition of PKCS11 to the code somewhere.  The header files supposed to be compatable with the following site, however you will have to try several versions to get them to work.

ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-11

A single comment was located indicating that this problem was introduced in 6.1, but no official fix was found.

The resulting code seems to work and produced some properly encrypted volumes with testing so far.

This is a problem with the truecrypt package, so will not be resolved by going to a later debian release (lenny?) when it arrives, unless someone picks this up and maintains a debian version and resolves the problem properly