What's the deal with Opera and width?

I’m trying to get a set of DIVs which have an image and then a link below them to appear like they do here. It works in Firefox, Safari, IE and Flock, but in Opera every icon appears with a horizontal scroll bar, unless I select ‘Fit to Width’ from the View menu. It looks fine in every browser except Opera, any ideas why/potential fixes for the problem? The overflow: hidden tag removes the scroll bars, so I’m thinking it must be something to do with the way Opera is dealing with the width of my DIVs…