KNOWN BUGS AND LIMITATIONS
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* PCF8511 support (Jeroen Domburg):
  unsolved page-shift kludge may occur which results in shifted Y-offset, 
  Jeroen (contributor of PCF8511-support) tries to identify and fix this bug

* some problems with USB:
  - whole USB-part needs some improvement
  - alphacool:
    closing the device may last some seconds
    but: annoying init-problem should be fixed: if this one is still existing: please let me know!