I've noticed when exporting from Max 9 with the current exporter (2009.1) that objects sometimes become rotated at a right angle. Sometimes I can export an object with y-up, then export the same object with z-up, and they both come into Unity with the same (wrong!) orientation. I also tried a few tests that seem to show that if you export an object with y-up, then again with z-up, then again with y-up, the first 2 exports will have the same incorrect (right angle) orientation, and the last one will be correct. Has anyone else run into this?