Strangely enough, I had the same problem... sorry, it was one of the minor niggles that had been completely forgotten about with that frame.
My solution was to run 28/38, there weren't clearance issues with bigger chainrings. I ride that combination all the time now anyway, so it wasn't a drama for me to switch over.
You can sit the derailleur really high with smaller rings, but then chainsuck becomes an issue. I think I also spaced my cranks out and cocked the derailleur at an angle and that helped to use small rings for a short period of time. The other option is to look at different model derailleurs to see if their cage shape could help you. Or just hit it with a hammer then run single ring