I have the same exact problem with a Record EPS that I recently installed into a Cannondale Supersix EVO, originally built for Di2. The BB cups and crank are stock Campagnolo and the arms are already super close to the FD, so I'm guessing that it's it'a derailleur twist/alignment issue. I can understand rub on the biggest ring, but not the top 3.
Here is a picture of what this rub looks like, but it's tough to capture the angle that suggests a slight mis-alignment in the braze-on mount. In the photo, you can see that there is plenty of clearance on the inner half of the cage, but contact on the outer. https://docs.google.com/file/d/0B_JO9QbXOPBmRHczSTc2R3U3c1U/edit
I'll hack on this a bit tonight and let you know what I find out.