At the edge of the LCD screen, cursor doesn't follow digitizer pen well.
The following ThinkPad systems that manufactured before December 1, 2011 maybe affected by this symptom:
A firmware update to improve digitizer accuracy is available.
To update the digitizer firmware, download the Digitizer Firmware Update Utility and execute the downloaded file. The utility will provide on screen display of the update progress. Ensure that you correctly follow the instruction provided in the web page for downloading , extracting and installation guide.
NOTE: Please do not power off the ThinkPad during the firmware update, or your digitizer may NOT be usable anymore.