I've noticed recently that whenever I type a number into any Office 2007 Application, whether it be Outlook, Excel, Word etc ... the number is automatically changed into a word. For example if I type "4", Office immediately changes it to "four".

I'm assuming that some setting has been changed somewhere along the line, but I have no idea what it would be. I would appreciate any suggestion on how to solve this, as it's become extremely annoying. Thanks.