I couldn't quite tell what it was until I full viewed it.. those are so horribly claustrophobic and disgusting. I guess that's what tourists get though, hah! Screwed! Awesome picture though, makes you double take AND full view.
Do you see just boxes or is only that you don't know the IPA?
If you only see boxes, install Lucida Sans Unicode or Arial Unicode MS -- these should come with MS Office already. Lucida Sans Unicode is free for download, Arial Unicode MS can be found for download, but it's illegal to do so in fact. Segoe UI is supposed to come with Longhorn but can already be found on the internet as well. If you want to be on the safe side, search for Gentium and/or the DejaVu fonts. Firefox should be able to automatically call up fonts that support the letters in question. If you have one of those fonts installed, make sure font replacement is switched on somewhere in the options -- I don't know whether you can switch it on and off at all, it should be working out-of-the-box actually.
If you're just looking for information on the IPA, see this page which has audio samples of all the symbols.