Link: What Goes On - The Beatles Anomalies Page.
Get you anorak on and head on over...
So define an "anomaly" then?
Well, it's difficult, as it is a subjective thing! But I'd say it's any sound which some people feel shouldn't really be there, and in a perfect world, wouldn't be there! Something which, years later, people are finding and saying, "So what caused that?", or "What did he say again?". Examples are edits which stick out (where takes have been joined together), vocal chatter not directly part of the record, recording glitches .... It's not only limited to mistakes -- a mistake is an anomaly, but not all anomalies are mistakes.