Here's a list of all the errors in Let It Be, including the whisper!Let It Be
Drumstick clicks (LIB Album version only, not on Past Masters)
1:07 (Past Masters/Blue Album Only, not Let It Be album)
After the words "For though they may be parted," there is a whisper, possibly "Stop, John/It". Rumour has it that it's "Excuse me", as a result of John having just parted. Yes, I did spell that right.
Thanks to Biffy, the Elephant Shrew for explaining all .... Paul does seem to giggle a little here!
Stephen Moss adds :-
This sound doesn't sound like John, unless it's a low whisper that shouldn't be picking up on Paul's mic. More likely it's from the booth; it might be the word "sibilance"
1:21 (Past Masters version only, not LIB Album)
Reported as a thump against microphone, I think it's again a plosive (breath noise into microphone)
1:46 (Past Masters version, not LIB Album)
Right channel, John or George play 3 wrong notes as they head into the solo, then stop altogether.
Three little distortions in organ solo (last few notes)
1:59-2:26 (Past Masters version, LIB Album version)
Centre, bleed of the "other" guitar solo evident in many places.
One note in guitar solo, very quiet, is wrong. Sounds like an open string being caught or released?
Piano chord under the word "Mother" is wrongly played, and quickly corrected.
Tony Cox adds :- ... the title track drums have been doctored by Phil Spector as follows. at 0:52 ringo originally played a SINGLE hi-hat on each bar (one on BROKEN, next one on PEOPLE, next on IN etc, but Phil Spector took the whole drum track(s) and passed it through an echo unit so the (whole) drum kit repeats in 16ths, so BROKEN is accompanied by tic-tic-tic-tic... Now here's the woof:
This works well at this verse, but on the next verse the song changed tempo everso slightly. And PS never adjusted the echo, so at ANSWER 1:14, the real hihat and the echoed hihat overlap into a splurge. Secondly, going into the chorus then, he didn't turn off the echo soon enough so the drums at 1:18 is a mess.