ok, a little more searching, and I found this:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/284211
which has some instructions on editing the connection profiles that network-manager (-gnome?) creates. I removed a wep40, wep104, and ccmp from the group field, and a ccmp from the pairwise field, and now it connects fine.
ok, a little more searching, and I found this:
https:/ /bugs.launchpad .net/ubuntu/ +source/ network- manager/ +bug/284211
which has some instructions on editing the connection profiles that network-manager (-gnome?) creates. I removed a wep40, wep104, and ccmp from the group field, and a ccmp from the pairwise field, and now it connects fine.