Very strange, but Lennys first post in the thread about his lock problem is missing. To sum up, Lennys knife was giving him problems so he sent it to CRK. Chris called him and asked if he had been flicking the knife, because the lock was unusually worn, and not by normal use. Chris said he would replace the handle slab for a cost, and toss in a replacement blade since his was not in the best of shape.
Lenny then came on the forum to express his disappointment at the level of customer service he was given by CRK, and to stress that he had never done anything to the knife to cause the problem. This resulted in a great deal of controversy from many interested partys before it was revealed by a forum member with a good memory that Lenny had indeed adjusted his lock-bar some time back and mentioned it in a thread over at knifeforums.
So in short, it is ill advised to adjust the lock-bar yourself as it can cause the lock to wear improperly.