Fallacies: "science was wrong before"

On Skeptico:

As well as being a flawed argument, it also shows ignorance of how science works. Yes, science has been wrong, but the scientific method is self-correcting. And it is always scientists who have unearthed new evidence who do the correcting, never people who ignore the scientific method.

Ironically it also shows up the strength of science and the weakness of believer methods. For example, compare the way scientific errors are discovered and corrected, with what happens in, for example, astrology or alternative medicine. In those fields no errors are ever corrected for the simple reason that no one ever critically tests those beliefs to see if they even contain errors. Errors are a permanent feature of those beliefs. Error recognition and correction is a strength of science.