This same error was brought up two years ago in https://mb.srb2.org/threads/spike-sprites-are-1-pixel-off-centre.27392/, and it was marked as fixed?
Not a "bug" so to speak, but it's worth pointing out. As noted in the linked thread, the other USPK sprites are aligned correctly.
Not a "bug" so to speak, but it's worth pointing out. As noted in the linked thread, the other USPK sprites are aligned correctly.