[ros-users] openni-kinect install error

Hello all,
I moved to Ubuntu 11.04 this week after ros was available for it. However there is an error when I want to install openni-kinect.
The error message:

xiao@ubuntu:~$ sudo apt-get install ros-diamondback-openni-kinect [sudo] password for xiao: Reading package lists... DoneBuilding dependency tree       Reading state information... DoneSome packages could not be installed. This may mean that you haverequested an impossible situation or if you are using the unstabledistribution that some required packages have not yet been createdor been moved out of Incoming.The following information may help to resolve the situation:The following packages have unmet dependencies: ros-diamondback-openni-kinect : Depends: nite-dev but it is not going to be installedE: Broken packages

And then I tried to find the dependency problem, 
xiao@ubuntu:~$ sudo apt-get install nite-devReading package lists... DoneBuilding dependency tree       Reading state information... DoneSome packages could not be installed. This may mean that you haverequested an impossible situation or if you are using the unstabledistribution that some required packages have not yet been createdor been moved out of Incoming.The following information may help to resolve the situation:
The following packages have unmet dependencies: nite-dev : Depends: openni-dev (= 0.1.0~natty) but 1.1.0.41-5+natty1 is to be installedE: Broken packages
It seems to be caused by openni-dev version,  I also tried to install it from source, however when I wanted to download the source, the following error came to me:xiao@ubuntu:~$ hg clone https://kforge.ros.org/openni/driverswarning: kforge.ros.org certificate with fingerprint 9b:29:7b:22:3a:35:9c:e6:6c:ca:fe:b7:64:eb:1e:cd:bf:01:0a:92 not verified (check hostfingerprints or web.cacerts config setting)abort: HTTP Error 500: Internal Server Error

Any idea on how to solve this problem?
Cheers,Junhao