Yeah, that is a new (but somewhat related) bug; both of these are related to changes in postgres from 7.2 to 7.3 for
timestamp handling and this package was never updated.
In this case, trunc on an interval used to return the number
of days but that was removed in 7.3, now it should use
date_part('days',...).
the other thing to do after you fix these is to submit a patch
in bug tracker so everyone else can benefit from your
bug fixing :)
There are some instructions for that here
It's good if they are attached to a bug report but even if not
submitting patches is the best way (short of committing directly) to make sure the fixes find their way into the release.
