See how much round-off error and other inaccuracies confuse a test that an inexperienced user would "expect" to work. The sprite is placed at the origin and then moved by 0.1 steps (or degrees) 50 times and then the end position is compared to the expected result of 5. Scratch1.4 - I expected this to match...oddly enough, it does not. Now the question is - should it? I think it should. Flash - We'll see how John's latest attempt does this.