Homepage has diff template than other pages

I have installed Joomla, installed MJ, added a couple of test pages.

I am using an HTC Incredible.

The homepage renders the pda template correctly but when I click on a link the page template is stripped/changed and the menu is now a bullet point list, not a horizontal menu. It's as if the CSS file is not being picked up on the internal pages.

Any clue why?

Thanks.

Could you give us the link to your site?