Confirmed here as well with bluetooth keyboard and with mouse clicks.

The bluetooth keyboard shows doubles on input however types and responds
just fine. The mouse however does cause issues within the system on
clicking. Simple usb Logitec M100 mouse.

Kernel
3.2.0-32-generic

lsusb
Bus 002 Device 006: ID 046d:c05a Logitech, Inc. Optical Mouse M90

Mouse Click/release output
xev output `xev | grep Button`
ButtonPress event, serial 33, synthetic NO, window 0x4c00001,
ButtonRelease event, serial 33, synthetic NO, window 0x4c00001,

Keyboard Press output
`xev | grep Key`
KeyPress event, serial 36, synthetic NO, window 0x4c00001,
KeyRelease event, serial 36, synthetic NO, window 0x4c00001,

annoying.

Just tried this with an older mouse and the double-click problem has not 
happened once; however I did note the xev output is identical
`xev | grep Button`
ButtonPress event, serial 33, synthetic NO, window 0x5600001,
ButtonRelease event, serial 33, synthetic NO, window 0x5600001,

I believe this is a hardware problem based on the evidence from above coupled 
with the feedback from the 
http://ubuntuforums.org/showthread.php?t=1429091&page=2
mice manufacturers focus on speed, and thus new mice spit the output out much 
faster then older mice..... of course I don't have much to substantiate this 
claim; so at this point it's mere opinion.

Ultimately this hardware "bug" should be dealt with by the o/s though
and a mere measure implimented to determine that a human doesn't double
click in mere milliseconds.

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https://bugs.launchpad.net/bugs/365300

Title:
  Randomly I get double clicks when I do a single click.

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