I use ubuntu 10.10
Compile kdenlive using the script http://www.mltframework.org/bin/view/MLT/BuildScripts
(./build-kdenlive.sh )


...
Generating moc_abstractaudioscopewidget.cpp
Generating moc_openclipart.cpp
[ 1%] Built target kdenlive_automoc
make: *** [all] Error 2
ERROR: Unable to build kdenlive
LOG: Process has finished. Reason: FAILURE Some kind of error occured: Unable to build kdenlive
timur@timur:~/kdenlive$
------------------------
All dependencies are installed

-- Found OpenGL: /usr/lib/libGL.so
-- Found Soprano: /usr/include
-- Found SharedDesktopOntologies: /usr/share/ontology
-- Found Nepomuk: /usr/lib/libnepomuk.so
-- checking for module 'QJson>=0.5'
-- found QJson, version 0.7.1
-- Found QJSON: qjson;QtCore
-- Found LibV4L2: /usr/include
-- Looking for include file linux/input.h
-- Looking for include file linux/input.h - found
-- Found shared-mime-info version: 0.71
-- Building experimental executables

-----------------------------------------------------------------------------
-- The following external packages were located on your system.
-- This installation will have the extra features provided by these packages.
-----------------------------------------------------------------------------
* KDELibs - KDE core libraries
* MLT - Multimedia framework and video playout server for TV broadcasting
* Soprano - Semantic Desktop Storing
* Shared desktop ontologies - Desktop ontologies
* libv4l - Collection of video4linux support libraries
* QtOpenGL - Qt bindings for the OpenGL library
* QtScript - Qt module providing core scripting facilities
* Nepomuk - Support for the Nepomuk semantic desktop system
* QJson - Qt-based library that maps JSON data to QVariant objects

-----------------------------------------------------------------------------
-- Congratulations! All external packages have been found.
-----------------------------------------------------------------------------



...
...
Policy CMP0017 is not set: Prefer files from the CMake module directory
when including from there. Run "cmake --help-policy CMP0017" for policy
details. Use the cmake_policy command to set the policy and suppress this
warning.
Call Stack (most recent call first):
/usr/share/cmake-2.8/Modules/FindThreads.cmake:165 (INCLUDE)
/usr/share/kde4/apps/cmake/modules/Qt4ConfigDependentSettings.cmake:32 (FIND_PACKAGE)
/usr/share/kde4/apps/cmake/modules/FindQt4.cmake:1217 (INCLUDE)
CMakeLists.txt:63 (find_package)
This warning is for project developers. Use -Wno-dev to suppress it.

-- checking for module 'mlt++'
-- found mlt++, version 0.8.9
-- Found MLT++: /home/dell/kdenlive/20130425/lib/libmlt++.so
CMake Warning (dev) at /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:92 (INCLUDE):
File /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake
includes /usr/share/kde4/apps/cmake/modules/CMakeParseArguments.cmake
(found via CMAKE_MODULE_PATH) which shadows
/usr/share/cmake-2.8/Modules/CMakeParseArguments.cmake. This may cause
errors later on .
------------------------------

I use cmake 2.8.7-1 from https://launchpad.net/~jackmorrison1/+archive/cmake-ppa?field.series_filter=maverick
Maybe this is the reason?