Might have to migrate to iText 5.0 to tackle this. Migrate first, test, and see if that solves the problem.
This continues to be a problem even with the update to iText v. 2.1.7. This really should be fixed before v. 0.2.2 is released, if at all possible.
See work log. Problem with how I interfaced to iText. Font registration now works correctly.