Would like to confirm this as well. Occasionally after going on and off wifi the device refuses to reconnect with the "network error try again?" message, reboot fixes the issue. Sometimes this happens within a day or so from booting, the last time I ran into this was after five days of uptime. There seems to be no consistency or a common cause (that I can find).

Dmesg unhelpful, using wpa2-psk (both access point and n900 set to wpa2 only). Scanning for networks and connecting to unencrypted networks works okay.


...next time this happens I think I'll install syslog and see if there's anything in there...