ARGGGG 2nd macbook, SAME problem. I try to run the office installer, it bounces a few times on the dock, then goes away. Exact same issue with Toast. What gives? If that isn't annoying enough, archives I try to expand with Stuff it (files like .zip.001, .zip.002, etc) "17999 Unspecified Stuffit engine internal error". (this actually worked fine on my first macbook) All of the above at one time or another worked on a macbook. I had the same office running fine on my last macbook before it got returned. Except after a week or two, each office application (word, excel, etc.) would open--bounce on the dock and dissapear the same way as the installer. and before you say it, im running all of the latest system software, firmware however i am unsure of. Seriously, if i could just resolve these two issues, i'd be the biggest newbie mac enthusiast ever. WHAT GIVES! SOMEONE HELP!!!!!