I am a Mac user (operation system Mountain Lion) and have a strange problem after upgrade from Lion to Mountain Lion with my excel program (version Microsoft Excel for Mac 2011 Version 14.1.0). When I type a data in a cell, just upon completing my data, the data is permanently entered in the cell before I press the enter button. Sometimes this happens before I complete my insertion and strange word remains in the cell usually couple of letters disappearing. I have tried to correct this with changing options for ''Auto Correct'' and ''Auto Complete'' at preferences, but had no success. I will appreciate if you can help me for solving this problem.