Are you sure you're focusing on something that is *really* at infinity (e.g., the moon)?

If your rangefinder truly is misaligned at infinity, then I agree with takef586. Proper alignment at closer distances matters far more than slight misalignment at infinity (unless you are a landscape photographer who will make serious enlargements). But, if your camera is still under warranty, it's probably worth the wait to have the rangefinder adjusted.