Quotes about bug
A collection of quotes on the topic of bug, people, likeness, use.
Quotes about bug

All Shook Up, written by Otis Blackwell and Elvis Presley (1957)
Song lyrics

Jokes and their Relation to the Cognitive Unconscious (1980)

“Given enough eyeballs, all bugs are shallow.”

Letter to George Bainton, 15 October 1888, solicited for and printed in George Bainton, The Art of Authorship: Literary Reminiscences, Methods of Work, and Advice to Young Beginners (1890), pp. 87–88 http://books.google.com/books?id=XjBjzRN71_IC&pg=PA87.
Twain repeated the lightning bug/lightning comparison in several contexts, and credited Josh Billings for the idea:
Josh Billings defined the difference between humor and wit as that between the lightning bug and the lightning.
Speech at the 145th annual dinner of St. Andrew's Society, New York, 30 November 1901, Mark Twain Speaking (1976), ed. Paul Fatout, p. 424
Billings' original wording was characteristically affected:
Don't mistake vivacity for wit, thare iz about az mutch difference az thare iz between lightning and a lightning bug.
Josh Billings' Old Farmer's Allminax, "January 1871" http://books.google.com/books?id=sUI1AAAAMAAJ&pg=PT30. Also in Everybody's Friend, or; Josh Billing's Encyclopedia and Proverbial Philosophy of Wit and Humor (1874), p. 304 http://books.google.com/books?id=7rA8AAAAYAAJ&pg=PA304
Source: The Wit and Wisdom of Mark Twain

My Inventions by Nikola Tesla, ISBN 978-1614270843 , p. 45

Perennial fashion — Jazz, as quoted in The Sociology of Rock (1978) by Simon Frith,
“Too late, you're in the express line!”
"Metaphorical Reasons", Live Songs and Stories (What Are Records?, 2002)

1960s, Portrait of a Genius As a Young Chess Master (1961)

Nicholas Negroponte: A 30-year history of the future http://www.ted.com/talks/nicholas_negroponte_a_30_year_history_of_the_future, July 2014, TED Talks (about 13:40 into 19:43 video).
A 30-year history of the future, TED Talk (2014)

Source: Das Ressentiment im Aufbau der Moralen (1912), L. Coser, trans. (1961), pp. 88-92

“Though the flesh be bugged, the circumstances of existence are still pretty glorious.”
Variant: Let the mind beware, that though the flesh be bugged, the circumstances of existence are pretty glorious.
Source: The Dharma Bums

“In other words, crew deaths are a feature, not a bug," Cassaway said, dryly.”
Source: Redshirts
“Accept that some days you’re the bug, and some days you’re going to be the windshield.”
Source: The Sweetest Thing

“Looks like it's time to liven up this dead little town!" - Saint Dane (The Reality Bug)”
Source: The Reality Bug

“Program testing can be used to show the presence of bugs, but never to show their absence!”
Dijkstra (1970) " Notes On Structured Programming http://www.cs.utexas.edu/users/EWD/ewd02xx/EWD249.PDF" (EWD249), Section 3 ("On The Reliability of Mechanisms"), corollary at the end.
1970s
Variant: Program testing can be a very effective way to show the presence of bugs, but it is hopelessly inadequate for showing their absence.
M. B. Douthwaite (2002) Enabling Innovation: A Practical Guide to Understanding and Fostering Technological Change. p. 116

Quoted in, "Chat with Ryan Gordon" http://web.archive.org/web/20010502182109/http://www.descent-3.com/pad/news/16.html Chrono's Pad (2001-02-11)

“That is a known bug in 5.00550. Either an upgrade or a downgrade will fix it.”
[6vu1vo%2489c@kiev.wall.org, 1998]
Usenet postings, 1998

Excerpted from Chapter 11 "The Profession of Engineering"
The Memoirs of Herbert Hoover: Years of Adventure, 1874-1929 (1951)

from "Elegy for Wonderland", by Ben Hecht, Esquire Magazine, March 1959

"The Free Software Movement and the GNU/Linux Operating System", address at LinuxTag (July 2000)
2000s

Bassics interview (1999)

Prince Simon Bentrik in Space Viking (1962-1963)

“The holy world glows like a lightening bug.”
“The Fruit Bearer,” p. 29
The Creator (2000), Sequence: “Forest of the Universe”

"How Awful When Poetry Ages As It Is Read"
I've Learned Some Things (2008)
1995/6
About Microsoft

Creation seminars (2003-2005), Dinosaurs and the Bible

"Why Cartoons Are Forever", Los Angeles Times (3 December 1989)
Quoted in Robin Heggelund Hansen, "Porting games to Linux" http://www.hardware.no/artikler/ryan_c_gordon_and_michael_simms/68450/4 hardware.no (2009-03-10)

“From then on, when anything went wrong with a computer, we said it had bugs in it.”
On the removal of a 2-inch-long moth from the Harvard Mark II experimental computer at Harvard in 1947, as quoted in Time (16 April 1984). Note that the term "bug" was in use by people in several technical disciplines long before that; Thomas Edison used the term, and it was common AT&T parlance in the 1920s to refer to bugs in the wires. Hopper is credited with popularizing the term's use in the computing field.
As quoted in "Rumpole creator Mortimer dies at 85" by Sam Marsden and Chris Moncrieff, The Independent (16 January 2009) http://www.independent.co.uk/news/people/news/rumpole-creator-mortimer-dies-at-85-1391378.html

"MEME 2.04", an interview with David S. Bennahum (1996)
1990s
“"The question is, is that a bug or a feature?" Karl asked.”
The Wizardry Compiled (1989)

Adamson, "Witty Birds and Well-Drawn Cats", 61.

Januszczak, Waldemar. "The Paint Stripper" http://entertainment.timesonline.co.uk/tol/arts_and_entertainment/visual_arts/article1899443.ece, (2007-06-10)
On getting into character to paint Princess Diana in the work 'Hi Paul, can you come over...'.

"The Man Who Named the World" (1990)

Barry Mazur, [Number Theory as Gadfly, Amer. Math. Monthly, 98, 1991, 593–610, http://www.maa.org/programs/maa-awards/writing-awards/number-theory-as-gadfly]

As quoted in How to Organise Competition? Collected Works, Vol. 26, pages. 411, 414.
Attributions

Brandon Flowers on what song would be playing if he went to hell. (2005) ( Rolling Stone Magazine http://www.rollingstone.com/news/story/_/id/7235375/thekillers?pageid=rs.Artistcage&pageregion=triple3)
Kenneth Boulding (1966) Economics and Ecology. p. 225
1960s

My Heart Will Always Be The B-Side To My Tongue (2004), Ultimate Guitar Interview (2008)
Source: The Capture (2003), Chapter Twenty-four: "Empty Hollows", p. 181

Conversation: Elon Musk on Wired Science (2007)

Focus Magazine No. 43 (23 October 1995) http://www.cantrip.org/nobugs.html <!-- pages 206-212 -->
1990s

“Testing shows the presence, not the absence of bugs”
Dijkstra (1969) J.N. Buxton and B. Randell, eds, Software Engineering Techniques, April 1970, p. 16. Report on a conference sponsored by the NATO Science Committee, Rome, Italy, 27–31 October 1969. http://homepages.cs.ncl.ac.uk/brian.randell/NATO/nato1969.PDF Possibly the earliest documented use of the famous quote.
1960s

6 December 2014 https://twitter.com/alka_seltzer666/status/541373309490044928
Twitter https://twitter.com/alka_seltzer666 posts

Quoted from the Gambas Website, http://gambas.sourceforge.net/introduction.html http://gambas.sourceforge.net/introduction.html

1970s, How do we tell truths that might hurt? (1975)

And I said, "Well that's wrong."
A Conversation with Ward Cunningham (2003), Collective Ownership of Code and Text

“Beware of bugs in the above code; I have only proved it correct, not tried it.”
Donald Knuth's webpage http://www-cs-faculty.stanford.edu/~knuth/faq.html states the line was used to end a memo entitled Notes on the van Emde Boas construction of priority deques: An instructive use of recursion (1977)

Harper's Magazine (October 1938); quoted in Scott Elledge, E.B. White: A Biography (New York: Norton, 1984), ch. X: Mr Tilley's Departure (p. 209)

Scorched Earth: Restoring the Country after Obama (2016)

Source: Evolution (2002), Chapter 16 “An Entangled Bank” section I (pp. 509-510)

Twitter post https://twitter.com/BillKristol/status/1053642303372386304 (20 October 2018)
2010s, 2018

“Here Skugg lies snug
As a bug in a rug.”
Letter to Miss Georgiana Shipley (September, 1772); reported in Bartlett's Familiar Quotations, 10th ed. (1919).
Epistles
"Back to the Trees!" http://www.ncc-1776.org/tle2010/tle565-20100411-02.html 11 April 2010.

page 92
At That Point in Time, Tapes and the threat of wiretapping

Source: On Building Systems That Will Fail (1991), p. 78

Source: Hoffa The Real Story (1975), Chapter 10, Chattanooga Choo-choo, p. 164