Width problems in Safari Mac and IE PC

I am really close to launching my site (or thought I was) when I checked the width on Safari on the Mac and IE on the pc (I have been developing on Firefox on the Mac).

To my surprise the width is way too thin.

I selected narrow width for my template option.

I provided screen shots of IE on the PC and Safari and Firefox on the Mac both my site and your Corporate 2 demo site, so you can see how it should look. Your demo site looks fine.

Please help.

http://www.chicagopaws.com/Joomla2

Thanks.