i have a kinda same problem..
But my wifi was working perfectly on my phone for a month unitl yesterday it just stopped. It is connected but no webpages load or anything. Its working on my laptop but not on my n900. Im using vodafone GPRS at the moment. Any ideas as to what could ahve gone wrong suddenly?

Please help.

I reinstalled the firmware and formatted the phone and did everything. Any ideas pleasE?