Obviously my brand of magic fails me when it comes to CSS :-)
Gotta say I’m impressed with what you did but I also don’t understand it. I can see you made an unordered list, by how do you make the images turn to the new row after some time? Just by defining the total width? And why does the wide image come as the fifth from the bottom.
A five by four tiled layout, where I have some flexibilty with different tile size combinations. The width must be 735px and the space between images exactly 5px (no margin on the outside). So i’m not so sure how to apply what you showed me to that end.
I just thought a table with white rows and columns inbetween would be easiest :-p