On my website (see below), I have quite a few roll-over vignettes. When loading up the home page first time with an empty cache, there is a rather lengthy load-up time on the right hand side of the display. Of course, once all the necessary information is stored in the cache, the load-up is almost instantaneous. How can I reduce the delay? I've already optimised the vignettes in Photoshop or at least I've optimised them to the best of my ability.