generate_messages fails with ros_comm

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While installing with source, I've started seeing this error after synching ros_comm src to the latest commit (not sure if the error starts happening since this particular commit or earlier).

So far I only see this error while building either/both rqt_common_plugins or/and rqt_robot_plugins metapkgs, particularly with the packages rqt_image_view, raqt_rviz where neither of them use the target mentioned in the error message.

The error doesn't happen when I switch ros_comm to binary (1.9.46-0quantal-20130625-1625-+0000).

catkin 0.5.67, Ubuntu 12.10

$ catkin_make
:
-- +++ processing catkin package: 'roscpp'
-- ==> add_subdirectory(ros_comm/clients/roscpp)
-- Boost version: 1.49.0
-- Found the following Boost libraries:
--   signals
--   filesystem
--   system
-- roscpp: 1 messages, 3 services
CMake Error at /home/rosuser/catkin_ws/build/ros_comm/clients/roscpp/cmake/roscpp-genmsg.cmake:53 (add_custom_target):
  add_custom_target cannot create target "roscpp_generate_messages_cpp"
  because another target with the same name already exists.  The existing
  target is a custom target created in source directory
  "/home/rosuser/catkin_ws/src/rqt_common_plugins/rqt_image_view".
  See documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  /opt/ros/groovy/share/genmsg/cmake/genmsg-extras.cmake:280 (include)
  ros_comm/clients/roscpp/CMakeLists.txt:35 (generate_messages)


CMake Error at /home/rosuser/catkin_ws/build/ros_comm/clients/roscpp/cmake/roscpp-genmsg.cmake:100 (add_custom_target):
  add_custom_target cannot create target "roscpp_generate_messages_lisp"
  because another target with the same name already exists.  The existing
  target is a custom target created in source directory
  "/home/rosuser/catkin_ws/src/rqt_common_plugins/rqt_image_view".
  See documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  /opt/ros/groovy/share/genmsg/cmake/genmsg-extras.cmake:280 (include)
  ros_comm/clients/roscpp/CMakeLists.txt:35 (generate_messages)


CMake Error at /home/rosuser/catkin_ws/build/ros_comm/clients/roscpp/cmake/roscpp-genmsg.cmake:147 (add_custom_target):
  add_custom_target cannot create target "roscpp_generate_messages_py"
  because another target with the same name already exists.  The existing
  target is a custom target created in source directory
  "/home/rosuser/catkin_ws/src/rqt_common_plugins/rqt_image_view".
  See documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  /opt/ros/groovy/share/genmsg/cmake/genmsg-extras.cmake:280 (include)
  ros_comm/clients/roscpp/CMakeLists.txt:35 (generate_messages)
```

What can be wrong? Thank you!

Update-1) I see a similar error with different combination, which I've found a workaround for but don't understand yet.

-- +++ processing catkin package: 'tf'
-- ==> add_subdirectory(geometry/tf)
-- Boost version: 1.46.1
-- Found the following Boost libraries:
--   thread
--   signals
-- tf: 1 messages, 1 services
CMake Error at /home/noodlelover/catkinws/build/geometry/tf/cmake/tf-genmsg.cmake:41 (add_custom_target):
  add_custom_target cannot create target "tf_generate_messages_cpp" because
  another target with the same name already exists.  The existing target is a
  custom target created in source directory
  "/home/noodlelover/catkinws/src/rqt_robot_plugins/rqt_rviz".
  See documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  /opt/ros/hydro/share/genmsg/cmake/genmsg-extras.cmake:280 (include)
  geometry/tf/CMakeLists.txt:20 (generate_messages)
:  
-- Found PythonLibs: /usr/lib/libpython2.7.so 
-- +++ processing catkin package: 'tf_conversions'
-- ==> add_subdirectory(geometry/tf_conversions)
-- Eigen found (include: /usr/include/eigen3)
-- Configuring incomplete, errors occurred!
Invoking "cmake" failed

Workaround for ... (more)