10sp usable gears - Page 3

I hear you, crank. And I've seen the problem, mostly on triples with short chainstays. And I imagine you don't want to buy a new frame with longer chainstays.

If you have outboard BB bearings, try a thin shim between the drive-side bearing (or cup if you have inboard bearings) and the BB shell. This will screw up the chainline a little in favor of your small cassette cogs, but it should push the rings out enough to stop the rubbing. 10-speed chains are flexible enough that a little chainline fudging isn't going to break anything.

See your local shop about bottom bracket shims. And remember to re-adjust your front derailleur cable tension and limit screws.