I use Firefox 4 and your site just fine.

It's showing a blank page for me on Firefox 4... :S

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Looks fine to me in Firefox 3.6.

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It looks fine for me in Firefox 3.6 but your images take a long time to load. The top one is especially slow. It's 233.28 KB which is big. You should try to keep them down under 65 KB, especially for us with slow / light DHL internet connections.

Daniel is 113.52 KB, chicken post headline 102 KB, book cover 100 KB, your coverpage.png is 343.69 KB, table of content 143 KB, etc. I haven't gone through them all.

And they're all trying to download at the same time. That could cause some of your visitors to click away. I'd at least work on the main header since it's the first thing people see.

Sylvia