Pgadmin posts an error message and then stops execution on windows reproducable if you do the following:
Open a DB,
expand to a Table
change Properties,
On Permission page define a SELECT UPDATE-permission
click OK
I can't reproduce this, which system are you using?
Regards, Andreas
---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match