Description of problem:
After hibernating, while using NetworkManager to manage a wired ethernet 
connection, NetworkManager fails to retrieve a DHCP IP address from dhcdbd, 
citing the error message "interface eth0 is being released. Please try again 
later." This isn't temporary, however, but persits until dhcdbp is restarted 
(sudo /etc/dbus-1/event.d/22dhcdbd restart). Alternatively, I can deactivate 
networking in NetworkManager and manually run "sudo dhclient eth0", which works 
instantly.

The problem is most likely dhcdbp going to a bad state. Dan Williams explains, 
"Apparently a dhcdbd bug, or some interaction between dhcdbd and
hibernate/suspend, possibly a race condition.  I'd bet that NM has told
dhcdbd to down the interface, and dhcdbd tried to release its acquired
address.  The machine goes to sleep during that operation, and when it
wakes up dhcdbd still thinks it's releasing the address, and doesn't let
any other operation happen."

Version-Release number of selected component (if applicable):
I'm using ubuntu feisty (just before its release).
dhcdbd 2.0-2ubuntu3
network-manager 0.6.4-6ubuntu7

How reproducible:
It happens every other suspend/resume cycle or so. After that, however, dhcdb 
stays indefinetly in its bad state.

Steps to Reproduce:
1.initiate suspend
2.resume
  
Actual results:
nm-applet shows that it's waiting for an IP address, and after a while stops

Expected results:
normal operation (IP address received)

Additional info:
I'm attaching a syslog excerpt which includes the output of manually running 
dhclient.