Please add mistakes and solutions in short description:
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Calibration finds to many points? 
  * Maybe your contrast is too low. Try to improve your [[brightness]], [[contrast]], [[gamma]], [[exposure time]], [[sensetivity]] in your [[camsettings]] till you get a clear black/white picture. Additional light helps.
  *   * If this fails: Use the [[Eraser]]

  * Maybe the cam sees more than DAVID´s [[calibrationcorner]]. Move cam or zoom in.
 
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Calibration finds less than 25 points?
  * Maybe your picture is noisy and oversaturated? Reduce [[contrast]]

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Calibrations does not find the 6 inner points?
  * :?::?::?:

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Calibration reports success but the red crosses are spreaded totaly wrong?
  * Did you change the coordinates in [[calibpoints.dat]]? If yes - Their values don´t fit to each other. Correct them.
  * Do you use a [[windowsetup]], [[minuscorner]] or [[negative Window]]? If yes - you have to change the [[calibpoints.dat]] file values.