Weird Text behaviour

Hi all,

A colleague of mine has recently installed the same version of Articulate as me on the same specification laptop as mine.

He has opened and existing project that I have recently worked and the fonts sizes are different!!!

For example I have a text bubble that has text in it that is size 12. When I select the bubble this is the size displayed in the font section of the ribbon and when I highlight the text the it is the same.

However when my colleague does the same thing the font size is 

a) different to mine

b) changes when either the bubble or the text is selected

This is driving is slightly mad!!!

We have the same font family installed, both are running Windows 7, have the same version of Articulate

Please please help!!!