My n800 (with OS2008) seems to have problems with wireless connections after upgrading.

I'm using the same N95 and WiFi AP I used before upgrading from OS2007, but now the BT connection to my Nokia hangs 4-5 times an hour... not better with WLAN. I must scan 3/4 times for internet connection to find my WLAN. Connection often fails, and if it doesn't fail it hangs after a few minutes...

What's going on?