I made Zolablue's cinnamon rolls, or a heavily modified version thereof, this morning.
The original calls for 25-30 minutes @ 375 F. Mine were still raw at 30, so I baked them for 40. They were still raw-ish (but edible) at 40, but the tops would burn if I let them bake any longer, so I took them out.
I know the reason they didn't bake through: the space I left between then (~1") pre-proofing went to 0" by the time they were fully proofed. Once oven spring kicked in, it was squish city. No room for them to expand.