These are some rumoured bootlegs that nobody seems to have been in contact
with, and some requests for information. I still (after all this time) hope someone will
be able to clarify some of these things, or just provide some of the details I want. To be
frank, this is very much an odds-and-ends page.
  Guamacoma. Long listed as an unknown bootleg it
  was, but around New Year 2002/2003, posted to alt.binaries.sounds.mp3.1970s a
  set of 83 MP3 files under the heading of "Guamacoma" was. The tracks
  were:
  
    1. Mount St Mary's Concert
  2. Space Boy
    3. America Drinks
    4. Agency Man
    5. Randomonium
    6. In Memoriam Hieronymus Bosch
    7. The Eric Dolphy Memorial Barbeque
    8. Hungry Freaks, Daddy
    9. The Wild Man Fischer Story
    10. I'm the Meany
    11. Bacon Fat
    12. The Duke
    13. Help, I'm a Rock
    14. Return of the Son of Monster Magnet
    15. Sink Trap
    16. King Kong
    17. The String Quartet
    18. The Groupie Opera
    19. Interview
    20. The Final Solution
    21. Interview Part 1
    22. The Band Finds Some Pussy
    23. Penis Dimension
    24. Billy the Mountain (Studebaker Hoch)
    25. Billy the Mountain (Finale)
    26. Well (Baby, Please Don't Go)
    27. Mr Green Genes / King Kong / Chunga's Revenge
    28. I'm the Slime
    29. Ruthie-Ruthie & Babette Meet the Booger Man
    30. Smell My Beard
    31. Don't Eat the Yellow Snow
    32. Penguin in Bondage
    33. T'Mershi Duween
    34. Dog Meat
    35. Montana
    36. Stink-Foot
    37. Inca Roads
    38. Dog Meat
    39. Approximate
    40. Cosmik Debris
    41. Florentine Pogen
    42. Curse of the Zombads [see below]
    43. Ship Ahoy
    44. Munchkin Tits
    45. Drum Solo
    46. The T'Mershi Duween Variations
    47. Black Napkins
    48. I'm the Slime
    49. Peaches en Regalia
    50. Dancin' Fool
    51. The Purple Lagoon
    52. The Meek Shall Inherit Nothing
    53. Rollo
    54. Flambay
    55. Spider of Destiny
    56. Time Is Money
    57. Knick-Knack Leather
    58. Teenage Wind
    59. Chalk Pie
    60. We're Turning Again
    61. Them or Us
    62. Clowns on Velvet
    63. Fine Girl
    64. Doreen
    65. Pick Me, I'm Clean
    66. Teenage Wind
    67. Harder Than Your Husband
    68. Bamboozled by Love
    69. I Don't Wanna Get Drafted
    70. Falling in Love is a Stupid Habit
    71. Fine Girl
    72. Easy Meat
    73. Goblin Girl
    74. Two on the Town
    75. Suicide Chump
    76. While You Were Art 1
    77. Francesco Opus 1 Number 1 Movement 6
    78. Francesco Opus 1 Number 6
    79. Francesco Opus 1 Number 11
    80. Pedro's Dowry
    81. Truck-Driver Divorce
    82. Frogs with Dirty Little Lips
    83. None of the Above
  
  
  With few exceptions, the seasoned Zappa fan can pick out most of these
  tracks as standard bootleg fare, some rare, some not so rare. The number one
  exception was "Curse of the Zombads", a title known to have been
  recorded at the Over-Nite Sensation sessions. This track seemed suspect:
  
  
    PATRICK NEVE: It's a hoax!
  
    CHARLES ULRICH: It sounds like a MIDI performance. Listen in
    particular to the "drums".
  
    CHUCK SPINACH: I saw "Guamacoma" mentioned on the Boot
    FAQ page, as an "unknown" bootleg. I wonder whether the set posted
    as "Guamacoma" is the same set with the one phony track, or
    whether the whole thing is a meta-hoax (since b00ts are, themselves,
    inherently hoaxy) ...
  
  
  There, we leave Guamacoma for now and turn to other rumours and
  question marks.
  
  Is there really a boot CD version of the You Can't Do That
  on Stage Anymore Sampler, or did the rumour start because someone didn't
  realise there was an official CD release?
  The bootleg Egg on Your Face is not a Zappa boot but
  Led Zeppelin.
  On Palladium, New York,
    31 October 1981, is track 14 actually a mislisted "The Black Page
  #2", or is it another night's "Zoot Allures"?
  We need confirmed track lists for the following listed bootlegs:
  
  (We also need info on these unlisted bootlegs.)
  Live in New York,
  previously thought to be a copy of Halloween,
  is not that and now has a separate entry.
  "Orchestral Madness", long listed as an unknown bootleg, has now
  been shown to be only a sticker with the words "Orchestral Madness"
  on the cover of Serious Music. 
  Thanks to an excellent corrector, we now have Safe
  Muffinz placed correctly in time and space. (Unfortunately, it wasn't from
  the El Monte Legion Stadium, July 1971 - in fact, not even from the 1971
  tour, but from August 21 1970, Santa Monica Civic Center.)
   "Bobby" on Frankie
  Meets Bobby has been "confirmed" as Bobby Dylan, but we still
  "need" a track list for the Bobby side!
  According to a German bootleg dealer, the entire production run of Norwegian Rhapsody Volume
  2 was confiscated by the police in 1988. However, RXZ
  Records put out a 2-CD set in the 1990s, which included both volumes.
  Speaking of RXZ Records, it can not be said for sure
  whether or not they have anything to do with the Mothermania
  boot with bonus tracks on the supposedly Russian (a)RF label. RXZ have advertised it for sale, and may have copied it or even
  made the original.
  In February 1999, Mikael Agardsson forwarded a list of Polish flexi-disc
  postcards, which are now on a separate page.
  They seem to be unauthorised and illegal, but they are just too weird to fit in among the
  other bootlegs. :) As of August 1999, there is also a page on Russian flexi-discs.
  A bootleg called Beat the Box has been reported as "a single disc
  with minimal packaging in white with pink lettering, grainy photos, and ...
  apparently a no-name bootleg. It allegedly contains the original mixes of You Are
  What You Is as 'Frank intended for you to hear them' and one other tune with a
  different guitar solo or something. The store is asking $30 for it." From
  David Goodwin:
  
  Well, I've seen it. It is Crush
  All Boxes with bonus tracks, and it looks VERY cheap ... I'd
  stick with the original, personally.
  
  A 1984 Does Humor Belong in Music? boot on Collector Records is
  separate from the vinyl counterfeit,
  but whether or not it too is a plain counterfeit is not known.
  Civilization Phaze III has lookingly not been counterfeited on vinyl
  in Australia, despite rumours to the contrary (originating with Gail Zappa).
  Contrary to rumour, Wino
  Man, that zany boot, was NOT put out legally by the
  Dutch VPRO. It was, in "fact", the very first Dutch bootleg.
  Was Frank Zappa
  Gets His Shit Together also issued as a variant called Frank Zappa Gets His
  Shit Together in Europe?
  There was for a while a rumour about a Japanese 
 "live box"
  of 12 CDs, but this has been positively identified as the Japanese box of the You Can't Do That on Stage Anymore series,
  which came in a special package with a very thick book. (At one point, though, it was
  reported by an American imperialist as "some wiseguy repackaging the Stage
  series" :)
  To Motherbuggers
  Everywhere has been confirmed as a single album; seemingly, there was
  no truth in the rumour about a double. (Unless, of course, you know better? Mail me!)
  According to Lewis Saul in 1998, the PDQ record store in Tuscon,
  Arizona, once had a gigantic 10-or-12-LP boot box, the first disc of which supposedly
  contained a recording of "Mice", a solo for snare drum which
  was the first composition Zappa ever wrote. Lewis has later added that the discs were
  probably coloured. This box has not been identified and sounds extremely
  preposterous.
  Record Collector magazine #148, December 1991, lists a Live
  Over 20 Years, Stockholm '67/London '68 title as a 3" CD "promo".
  Whatever it is, it's definitely related to the Oldies But Goldies version of 'Tis the Season to Be Jelly,
  which was part of a Live - Over 20 Years Old series, and is
  comprised of Stockholm 1967 and London 1968 material. Either it's nothing but confusion,
  or perhaps a CD single to promote that album, which was technically legal in the country
  where it came out (because foreign live recordings became public domain ther if they were
  "over 20 years old"), even if it was of course unauthorised.
  The bootleg in the "rumour from Gravot", with PMRC hearing
  snippets, has been identified as All
  You Need Is Glove.
  People have been wanting the bootleg FAQ to include The Guitar World According to Frank Zappa, Blood on the Canvas, and the flexi-disc
  with a Synclavier version of "The Black Page #1" which once came with Keyboard
  Magazine - all legit releases and not bootlegs at all. Discography people
  have often avoided these square pegs, but now they've found a home in the Weirdo Discography.