This last update prevents network manager from working at least with my setup...

I'm using x86_64 ubuntu hardy and the hardware consists of an iwl3945 wireless card.

I get the following in syslog:
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Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) started... 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled... 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) started... 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled... 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) complete. 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) starting... 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0/wireless): access point 'kamikazeII' is encrypted, but NO valid key exists.  New key needed. 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) New wireless user key requested for network 'kamikazeII'. 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) complete. 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) New wireless user key for network 'kamikazeII' received. 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled... 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) started... 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled... 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) complete. 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) starting... 
Mar 21 20:12:47 luis-lpt NetworkManager: <info>  Activation (wlan0/wireless): access point 'kamikazeII' is encrypted, and a key exists.  No new key needed. 
Mar 21 20:12:48 luis-lpt NetworkManager: <WARN>  nm_signal_handler(): Caught signal 11.  Generating backtrace... 
Mar 21 20:12:48 luis-lpt NetworkManager: ******************* START **********************************
Mar 21 20:12:48 luis-lpt NetworkManager: (no debugging symbols found)
Mar 21 20:12:48 luis-lpt NetworkManager: Using host libthread_db library "/lib/libthread_db.so.1".
Mar 21 20:12:48 luis-lpt NetworkManager: (no debugging symbols found)
Mar 21 20:12:48 luis-lpt last message repeated 10 times
Mar 21 20:12:49 luis-lpt NetworkManager: [Thread debugging using libthread_db enabled]
Mar 21 20:12:49 luis-lpt NetworkManager: [New Thread 0x7ff3bb29a780 (LWP 11813)]
Mar 21 20:12:49 luis-lpt NetworkManager: [New Thread 0x40a06950 (LWP 11820)]
Mar 21 20:12:49 luis-lpt NetworkManager: [New Thread 0x41fba950 (LWP 11816)]
Mar 21 20:12:49 luis-lpt NetworkManager: (no debugging symbols found)
Mar 21 20:12:49 luis-lpt last message repeated 9 times
Mar 21 20:12:49 luis-lpt NetworkManager: 0x00007ff3b9611cc6 in poll () from /lib/libc.so.6
Mar 21 20:12:49 luis-lpt NetworkManager: ******************* END **********************************
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After downgrading to package network-manager_0.6.6-0ubuntu1_amd64.deb (downloaded from launchpad as sugested in ubuntu foruns) everything worked. Strange thing is that the problem didn't start with this update, but with the update of some other package... Maybe network manager needs rebuilding?