I know it sounds ridiculous, but because it happend couple of times, i wonder
if it's happening to anyone else.
1. Some formulars in cells changed randomly. For example, if the original
formular was "=d5/d7", it changed to "=d6/d8" even though i haven't inserted
any rows or columns.
2. Numbers changed randomly. If the number was "30", it changed to "0"
couple of times.

Did anybody have similar experience?