Hi Syake,

I have the same problem. I cant connect to any wifi now, after 2 years of N900 happiness.
It simply says : "network connection error. try again?" I noticed also that the visible network list displayed is not as long as it used to be. Only some of them are listed, randomly.

My dmesg is also:

10570.418945] wl1251: down
[10575.277801] wl1251: 151 tx blocks at 0x3b788, 35 rx blocks at 0x3a780
[10575.278167] wl1251: firmware booted (Rev 4.0.4.3.7)
[10575.305572] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[10578.444610] wlan0: direct probe to AP 50:67:f0:11:d8:9e try 1
[10578.637145] wlan0: direct probe to AP 50:67:f0:11:d8:9e try 2
[10578.832489] wlan0: direct probe to AP 50:67:f0:11:d8:9e try 3
[10579.027679] wlan0: direct probe to AP 50:67:f0:11:d8:9e timed out

Following your tip, i have this:

etc # cat dnsmasq.conf
domain-needed
bogus-priv
resolv-file=/var/run/resolv.conf
resolv-file=/var/run/resolv.conf.wlan0
resolv-file=/var/run/resolv.conf.ppp0
resolv-file=/var/run/resolv.conf.lo
resolv-file=/var/run/resolv.conf.gprs
/etc # ps -A |grep dnsmasq
1276 nobody 2160 S /usr/sbin/dnsmasq -k -i lo -a 127.0.0.1 -z
4294 root 2092 S grep dnsmasq
/etc #

Would you have a clue of what to do? I tried the forum solutions to wifi problems, iwconfig, wlancond up, mode managed etc, unsuccessfully.

Thanks