I just got my N900 and it has the weirdest issue with Wifi web browsing:

i can browse the web and use skype without any troubles over 3G

Skype works perfectly through my Wifi connection and i can login to the router without any issues BUT both the standard web browser and firefox do not work. They both give the "Server not found" error as if there is no internet connection.

I have checked the settings on my laptop, all i had to add was the DNS.

I can make skype calls perfectly over wifi.

i have rebooted the phone, router and modem plenty of times and even reset my router to default settings. im out of ideas. HELP!