Interesting. IMHO, the over-use of 'object' is inane. That issue is likely related to caching/architecture and is basically an 'error/optimization of no consequence'--a good test is if you change z1, does z2 get changed? Probably not, if it does, that is a bug. For the int vs real, again, a "bug" of no consequence--probably an optimization--how does this break code? Please post that part; make that your favorite. :-) (here come the flames & down votes... bite me)