I selected a polygon which was cleared by things. Then I issued changejoin(selected) and the polygon was still cleared. According to the builtin command reference this should change the status of the clearance.
I also tried to change the join of the polygon by pressing 's' over it but it said 'Sorry, this object is locked'. But the polygon was not locked. There was a bigger polygon over it which I locked intentionally. I suggest all tools except lock tool to be insensitive to locked objects. pcb version is 20060321 CL<