Put some padding on those cells.
Use a brighter color for the highlight of the buttons.
Use a smaller (not too small) text size for the login box.
Loose the shadow on the buttons. If your website is plain, your buttons should be plain.
On the header background, graduate to a light, desaturated blue, not pure white, instead.
That's really all there is to fix. Nice site.
I like it!!! ( I wish I could do something like that ... maybe someday I will - if they accept me here!). Pity my Dutch is simply non- existent...
Good job... it seems difficult! Is it???
Nice background image. The text at the top is a bit hard to read though. You could change the color to a solid black, or maybe a flat color of grey.
Looks to me like De server was gehacked. If his site was on server 2 he might have been a victem of the announced worm and his site is down at this time until he get's his web site fixed again.