This "bug" just happened to mine too. I had left the 770 unattended for a few months and when I finally picked it up again it started doing this. I now have "trouble" at times connecting to my AP's at home and at work. Nothing has changed in either of them, same routers, etc... Someone also mentioned "power problem." My 770 doesn't last as long in stand by these days, nowhere near 24 hours. Maybe that's related, I don't know.
OS: os2007HE installed packages: xterm, gainroot, wireless-tools step 1: get root access in a xterm step 2: run these commands in the xterm: ifconfig wlan0 up iwconfig wlan0 key <your wep key> iwconfig wlan0 mode managed iwconfig wlan0 essid <your ssid> ifconfig wlan0 <your ip> netmask <your netmask> route add -net 0.0.0.0 netmask 0.0.0.0 gw <your default gateway> echo "nameserver <your dns server>" > /etc/resolv.conf gconftool -s -t string /system/osso/connectivity/IAP/DEFAULT/type DUMMY In the above commands, replace "<blahblah>" with parameters of your network(without the '<' and '>'). Then minimo should work fine; when using any built-in applications and the 770 asks you to choose a connection, always choose "DEFAULT" from the list, and then everything should work fine. You can also put all the commands in a script to make it easier to run it again.