So what happened was that when I exited Sugarcane Corner I had basically no-collide mode on for all the houses, and the houses only. I could collide with trees and everything else, just not the houses. Unfortunately I didn't think of trying other special buildings before I left to a different map so I can't report on those.
I am unable to reproduce the bug at this time, so there must of been something odd happening that caused it to occur.
Edit: Now that was just idiodic of me not posting this in the help desk. At least it has not yet been reported though...