I think I finally found a route that is incompatible with TSX. Or a bug.
Was running Bay Of Quinte last night. Things were going ok then I noticed a large blob like shadow of sorts flash on half of the terrain, then flash off, then on the finally the game hardlocked to a SBHH. Running eyefinity I can never get a log file. The terrain "shadow" was large covering a large portion as far as the eye could see, but not all of the terrain. Was more like a tile it seemed.
Any clue yet as to what exactly would warrant a route incompatible with the TSX engine.