Recently psycopg2 has added a new autcommit attribute (bool type). SQLObject raises an exception trying to call the autocommit function in pgconnection.py. This patch catch the exception and set autocommit the correct value if so, so it's backward compatible.
sqlobject/postgres/pgconnection.py patch
Applied, refactored and committed in the revision 4428 in the trunk. Will be in the next release. Thank you very much!