Thorin, man... that's COLD!

As for the recording anomalies:
Recording anomalies are little mess-ups, edits, and various other things that aren't supposed to be in the recording. Like, say Bowie did one line of vocal off-beat, and that made it to the finished recording. That's an anomaly.
Likewise... for PF, there aren't many of those. One obvious one is the edit in Matilda Mother, where the solo turns into a verse. That is a really bad edit. Because that is a bad edit, and it made it to record, that is an anomaly.

If you're interested, this link will take you to the recording anomalies of the Beatles. It is a great site... and they can explain 'anomaly' better than I can.

www.pootle.demon.co.uk/wgo.htm