Hi, All!

I've got a very strange problem recently:
My home wifi network is not shown anymore in select connection dialog.
I mean wifi was working ok for half a year and then BANG (when I say BANG i mean installing dd-wrt on my router and installing batterypatch and speedpatch on my N900). Anyway all other computers and smartphones that were connected to my home wifi still work ok.
N900 can see a lot of networks in my neighbourhood but not my own. I tried setting connection manually - still no luck.
Everything was several times rebooted and changes are 0.

Is there any hidden blacklist for wifi APs that I might actually add my home wifi to?
Or maybe someone had same experience?

I'm out of ideas.