If you want to know whether or not you have the bug, there is a very simple test that I have verified several times to work.

When you are approaching a multiple of 62 on your trip OD, switch over to metric by pushing and holding the temp/mpg button for a second or two (next to the SEL/RESET button). Once you are in metric, watch the kilometers and the l/100km. Normally you will see very little change in the 1/100km meter. When you get to a multiple of 100 km, punch the accelerator hard for at least .3 km. You will see the l/100 km change significantly (increases) as the mileage goes from 100.0 to 100.3 (for example), assuming you have the bug. If you don't have the bug, you should see at most a .1 increase in l/100km.