It shouldn't happen, but it does. Today's mammoth rear clusters compounded by triple front chainrings make for decided disasters in terms of front derailer adjustment.

True, one can align the FD "close enough" to perfect for "on-the-stand" tolerances, and adjust cable tension on the FD so that indexed triples sit correctly in the center and large rings, but you still have to take into account the two possible (smallest cog/largest cog on rear cassette/freewheel) extreme angles the chain can and will take as it enters the FD towards the top of the chainring, and further to this, account for crank and frame flex when the bike is under load.

Shimano, Campagnolo and SRAM can sit with AutoCAD and design whatever pretty little drivetrains they care to with millimeter tolerances or less, but when the frame and/or crank that these components are mounted to start to flex, well - that's real-world engineering.

Of course, we all know that the more "speeds" the bike has, the more likely it'll sell for outlandish prices. Anyone for the latest "33 speed" (3x11)? I can't wait to see someone try to mass-market a quadruple front chainring - god knows it has been tried on old TA 6-pin cranks...

-Kurt

EDIT: You upgraded the FD? Was it designed for the same width rear cluster as you have presently?