New unions operations causing other parts to move off by .1 of a stud

So apparently for some reason when I do a new union operation it causes parts to move off from where they were by .1 studs and has made a few hours of work useless.

Do you use Resize-Align? just curious :]

Floating point errors maybe?

No, but appearently moving what I was building an unioning close to the center of the world seemed to fix the problem.

No, but appearently moving what I was building an unioning close to the center of the world seemed to fix the problem.[/quote]

So floating point errors.