It's not particularly common in Canada, although I do see it occasionally. The principal problem is that a dot (especially handwritten) is easy to miss, whereas

It's not particularly common in Canada, although I do see it occasionally. The principal problem is that a dot (especially handwritten) is easy to miss, whereas an unexpected leading zero induces the reader to check for a dot. I don't press the zero button on my calculator when inputting values, though, since it's an extra keystroke for literally nothing.