So, i made this design, and it ofc validates without errors:
[Valid] Markup Validation of http://local.pulse101.net/design1/ - W3C Markup Validator

Also the css validates:
W3C CSS Validator results for http://local.pulse101.net/design1/ (CSS level 2.1)

But if you first take a look in Firefox it looks like it should, but in IE 7 it is a total mess, which means i would have to implement IE hacks, which i really don't wan't to :(

If anyone have some ideas then i would appreciate it!

I nearly forgot the link: iACP - Intelligent Admin Control Panel