Why the difference?

[UKBusinessLive]

You can see what your site looks like in every single browser available here

http://browsershots.org/

Just add your url and wait for the screen shots, you can tick the ones you want or all of them but remember they will take time to load, so you need to wait.

As Lynne says, all browsers renger the sites differently, so bear that in mind.

I generally do firefox and IE, anything else is minor on my site.