Originally Posted by
ttopaz
What is your weight? Depending on your weight, bending of the frame under stress can cause shifting problems.
Because of that there is no point for someone else riding it at the shop for testing, you should do it.
I have the same problem. My frame is flexible enough so that climbing and shifting the front derailleur is a no-no. I have 2007 Tiagra and it needs to be under no stress to shift smoothly, and even then sometimes.