The title says it all.

I had this problem in PR1.1, thought it would have been fixed in PR1.2 but it still occurs, which is why I'm bringing it here.

My N9 can't connect to the internet (browser, twitter app, facebook app, store app) using my home wifi network.
I used that very same wifi-network to download the PR1.2 update though, without problems. Downloading went smooth. Don't have 3G coverage where I live, which makes browsing at home (over 2G) quite slow (don't even think about loading a youtube-video)

Is there anything I can do to fix this?