Hi Joe
This problem is outside of OP25.  As previously mentioned however we do want to hear all bug reports.
You may have to report this as a bug to the UHD list, but first you might try the commands for installing uhd for ubuntu which is at URL http://code.ettus.com/redmine/ettus/projects/uhd/wiki/UHD_Linux
as below  (You may alternatively want to use the instructions for unstable instead).   The aforementioned URL does say that ubuntu 12.04 is supported.  If you still have no luck, please report this as a bug to the proper mail list for UHD

Max

sudo bash -c 'echo "deb http://files.ettus.com/binaries/uhd_stable/repo/uhd/ubuntu/`lsb_release -cs` `lsb_release -cs` main" > /etc/apt/sources.list.d/ettus.list'
sudo apt-get update
sudo apt-get install -t `lsb_release -cs` uhd

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