Hi, Hank,I'm in zone 6b Michigan. We do not ever prune in the fall. As said earlier, it promotes new growth that has no chance of hardening off in time to survive a hard freeze, But also, roses store energy to start out with in the spring in their canes. If you cut those canes off now come spring they won't have any food to generate new growth with so they can start up photosynthesis. If you have some very tall plants just stake and tie the canes to keep them from whipping in the wind all winter. Miniatures get treated exactly the same way that regular roses do and in very cold climates you don't prune climbers much at all. Winter die back will do that for you unfortunately.
