I don't think anybody mentioned the strings as the possible culprit. Lucy Ann mentioned using Martin strings. I may be committing a major sacrilege here, but I have never been fond of Martin strings - to my ears (which admittedly have evidence of wear and tear), Martin strings start to go dead within hours of putting them on the instrument. Dead strings exacerbate tuning problems, with or without capos. I'd suggest putting on a FRESH set of Dean Markleys or Elixers and see if that helps. Also (I may be wrong on this too, but who's there to stop me from saying it!?!) if you're using light guage strings, the bending problem may be more pronounced than if you're using medium or even medium lights. But the what do I know? I'm just a guitar player. {he he}