frankly, i think its the luck of the draw... suay suay kena one that is problematic. imo, the dial is meant to be turned. if pentax ever came up with a statement that says "user should not turn the dial excessively", i'll never accept it.
this is really the only place i have heard of this problem. AFAIK, it had not been surfaced in pentaxforum or any of the overseas pentax community sites. or has it?