I also had this bug, it is fixed upstream in xf86-input-evdev  in commit
bb9b4146cb828bd366675e8736fc145e92c9269a

Until this is fixed in the repositories I've rebuilt the package as
described here: https://help.ubuntu.com/community/UpdatingADeb, using
the patch from here: http://cgit.freedesktop.org/xorg/driver/xf86-input-
evdev/diff/?id=bb9b4146cb828bd366675e8736fc145e92c9269a

This fixes the swapaxes being ignored on my system.
The invertX and invertY still seem to be ignored, but this can be worked around 
by changing the calibration from "0 1024 0 1024" to "1024 0 1024 0"

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https://bugs.launchpad.net/bugs/1103723

Title:
  the evdev driver of Xorg ignore the swap axes optiopn for N-trig
  multitouch

Status in “xserver-xorg-input-evdev” package in Ubuntu:
  Confirmed

Bug description:
  I have just received my dell xt3 
  I use kubuntu 12.04.1 fully update, with kde from the ppa backport repository.

  When I turn the screen into the tablet mode, I can rotate both the
  screen and the pen-eraser that are controlled by the Wacom driver.

  The multitouch screen is controlled by the evdev driver and does not rotate, 
in particular I am not able to swap the axis, 
  one of the necessary step of the rotation process the 
  xinput set-prop 12 "Evdev Axes Swap" 1
  does not produce any effect. 

  where the output of is xinput

  
  ⎡ Virtual core pointer                          id=2    [master pointer  (3)]
  ⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
  ⎜   ↳ N-Trig Pen stylus                         id=11   [slave  pointer  (2)]
  ⎜   ↳ N-Trig MultiTouch                         id=12   [slave  pointer  (2)]
  ⎜   ↳ N-Trig Touchscreen                        id=13   [slave  pointer  (2)]
  ⎜   ↳ DualPoint Stick                           id=15   [slave  pointer  (2)]
  ⎜   ↳ AlpsPS/2 ALPS DualPoint TouchPad          id=16   [slave  pointer  (2)]
  ⎜   ↳ N-Trig Pen eraser                         id=18   [slave  pointer  (2)]
  ⎜   ↳ N-Trig Pen pad                            id=19   [slave  pointer  (2)]
  ⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
      ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
      ↳ Power Button                              id=6    [slave  keyboard (3)]
      ↳ Video Bus                                 id=7    [slave  keyboard (3)]
      ↳ Power Button                              id=8    [slave  keyboard (3)]
      ↳ Sleep Button                              id=9    [slave  keyboard (3)]
      ↳ Laptop_Integrated_Webcam_HD               id=10   [slave  keyboard (3)]
      ↳ AT Translated Set 2 keyboard              id=14   [slave  keyboard (3)]
      ↳ Dell WMI hotkeys                          id=17   [slave  keyboard (3)]

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