Got very similar problem with nm but with 2.6.24-21. It looks to me that it may be related to the signal strength and or the proximity of another AP with signal level close to the one to which i'm connected at the moment. If I work at a couple of meter from my home AP nm seems to never lose the connection.
sudo modprobe -l iwl* /lib/modules/2.6.24-21-generic/ubuntu/wireless/iwlwifi/mac80211/compatible/net/mac80211/iwlwifi_mac80211.ko /lib/modules/2.6.24-21-generic/ubuntu/wireless/iwlwifi/mac80211/compatible/net/mac80211/iwlwifi_rc80211_simple.ko /lib/modules/2.6.24-21-generic/updates/iwl3945.ko /lib/modules/2.6.24-21-generic/updates/iwl4965.ko /lib/modules/2.6.24-21-generic/updates/iwlcore.ko -- iwl3945 not able to associate with kernel 2.6.26 and 2.6.27 https://bugs.launchpad.net/bugs/264881 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs