It was all cool (in Gutsy) until I upgraded to Intrepid.
Wireless networks still show up, but don't connect. Wired Networks don't even show up. I get a "Device is Unmanaged" message.

My Network Card is:
06:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)

My Kernel version:
2.6.27-9-generic

Iwlist scan outputs:

bah@blah:~$ sudo iwlist scan
[sudo] password for bah:
lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wmaster0 Interface doesn't support scanning.

eth1 Scan completed :
Cell 01 - Address: 00:13:46:1D0:4C
ESSID:"pavan"
Mode:Master
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=86/100 Signal level:-47 dBm Noise level=-85 dBm
Encryption keyn
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
48 Mb/s; 54 Mb/s
Extra:tsf=00000452866a9122
Extra: Last beacon: 64ms ago

bah@blah:~$

Trying to simply dhclient eth1 does not work either.

Any pointers on what's wrong and how to fix it?