Here's my website: http://www.flinthill.org.uk/
Click on the navigation links and the font changes from the styled font to an unprescribed serif. Dunno if this is a css issue at all - but it's very odd behaviour that is not happening in other browsers.

Here's the font stack - not a serif in sight.
font-family: “Helvetica Neue”, Arial, Helvetica, sans-serif;

There are no serifs in the style sheets, so I really am at a loss here.

Anyone come across this issue?

I am using html includes for the content area in my php pages to support cushycms - very simple wysiwyg editing software for my client.