Originally Posted by
cny-bikeman
Now you say you are lead to "believe" it is the frame, but your picture clearly shows you have a string run that would allow you to easily confirm that "belief." One problem, though - the strings are tied to the seat stays, not the dropouts - as both my earlier instructions and Sheldon's specify (although I would note that the illustration on Sheldon's site incorrectly shows the one side tied to the top of the dropout braze-on). On top of it the strings are at different heights on each stay, which guarantees an inaccurate measurement.
I'm not sure his string test can confirm anything. I might be wrong, but I don't think the string is going around the head tube. It looks more like it is going around the seat tube. If this is the case, then nothing can be learned from his test. Oh, I just saw the top picture, it is going around the seat tube. This test shows nothing.
Also, I am wondering how the mechanic tested the frame alignment. If he did test it and everything came out fine, was the wheel in the frame? I am wondering this because the OP said it was cold set to 130, but a 135 hub is in there. The frame could be aligned, but when the stays are spread to allow the insertion of the hub, only one stay might be giving. This could lead to the problem. The only other thing I can think of is if the wheel was in the frame when tested, is that the dropouts are not aligned properly. Were the dropouts tested?