Colours - Too dark for a wedding. Looks like you are selling halloween merchandise.
Splash pages are just a pain in the ass, and aren't common anymore.
The warning note about browsers- this isn't 1997, you have to be standards compliant. I know you may have a beef with IE6, but you aren't winning customers by not supporting a browser used by a quarter of internet users (and probably many more among your target)
The background a repeating wallpaper in mine, please no.
The tables or whatever are borked, and like jdcfsu said, scroll bars are everywhere - and I don't believe its because of screen size, it only seems to be in that top left corner.
Oh and
please don't have musak playing in your websites. Takes too long to load, and if I want music I'll choose it.
That said, the photographs are nice.
