I updated my ros diamondback installation to a new version yesterday
using the ubuntu update manager (lucid lynx 10.4). Now my builds which
took about 20 seconds before take 30 minutes!
The first few steps after running rosmake are the problem:

>>make
mkdir -p bin
cd build && cmake -Wdev -DCMAKE_TOOLCHAIN_FILE=`rospack find
rosbuild`/rostoolchain.cmake  ..
[rosbuild] Building package ias_cloud_loader
[rosbuild]
Including /opt/ros/diamondback/stacks/client_rosjava/rosjava/cmake/rosjava.cmake
[rosbuild]
Including /opt/ros/diamondback/stacks/ros_comm/clients/cpp/roscpp/cmake/roscpp.cmake
[rosbuild]
Including /opt/ros/diamondback/stacks/ros_comm/clients/roslisp/cmake/roslisp.cmake
[rosbuild]
Including /opt/ros/diamondback/stacks/ros_comm/clients/rospy/cmake/rospy.cmake
-- Configuring done

The rest of the process completes as fast as before.
In particular the rospack calls take ages.

Cheers,

Florian