I am new to MacRumours so please forgive me if this discussion has already taken place. I installed Yosemite on my MacBook Pro about 3 weeks ago. Yesterday I tried downloading an emailed Word document that had been edited with Track changes. My 2008 Mac Word program froze and I had to Force Quit. Nothing I did would allow me to download the document. Then my pad and mouse both were unable to scroll through a Word document. Aargh! I have version 12.3.6. Should I buy the 2011 Word for Mac - will that resolve any compatibility problems between the 2008 version and Yosemite?