avformat error?

I'm installing kdenlive 0.7 from svn with the Kdenlive Builder Wizard and while I have everything working right I get an error while compiling kdenlive and it suggests that I install avformat... I already have it installed from the ubuntu 8.10 repositories. I already reported this to the guy who works on the project but I'm just wondering if anyone else can help. Here's the end of the log file:

[ 97%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/regiongrabber.o
[ 98%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/editkeyframecommand.o
[100%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/clipdurationdialog.o
[101%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/managecapturesdialog.o
[101%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/changespeedcommand.o
[102%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/geometryval.o
[103%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/wizard.o
[104%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/customtrackscene.o
[105%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/abstractgroupitem.o
[105%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/keyframehelper.o
[106%] Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/editclipcommand.o
[107%] make[2]: *** No rule to make target `/build/buildd/kde4libs-4.1.2/obj-i486-linux-gnu/lib/libkdecore.so', needed by `src/cmake_bindir/kdenlive'.  Stop.
make[2]: *** Waiting for unfinished jobs....
Building CXX object src/cmake_bindir/CMakeFiles/kdenlive.dir/kdenlivesettings.o
make[1]: *** [src/cmake_bindir/CMakeFiles/kdenlive.dir/all] Error 2
make: *** [all] Error 2
KBWERROR: Unable to build kdenlive
KBWTRACE: Entering feedback_result @ = FAILURE Some kind of error occured: Unable to build kdenlive
KBWTRACE: Entering feedback_status @ = FAILURE Some kind of error occured: Unable to build kdenlive
KBWTRACE: Entering cmd @ = dcop kmdr-executor-28210 KommanderIf setText LabelFeedback FAILURE Some kind of error occured: Unable to build kdenlive
KBWLOG: About to run command: dcop kmdr-executor-28210 KommanderIf setText LabelFeedback FAILURE Some kind of error occured: Unable to build kdenlive
/tmp/kbw.script.sh.20081115.154533.gyvI28372: line 210: 28390 Killed                  keep_checking_abort  (wd: ~/Desktop/kdenlivetemp)
KBWTRACE: Entering cmd @ = dcop kmdr-executor-28210 KommanderIf execute ScriptObjectAddStatusLine
KBWLOG: About to run command: dcop kmdr-executor-28210 KommanderIf execute ScriptObjectAddStatusLine

KBWTRACE: Entering cmd @ = dcop kmdr-executor-28210 KommanderIf setText LabelFinalResult FAILURE Some kind of error occured: Unable to build kdenlive
KBWLOG: About to run command: dcop kmdr-executor-28210 KommanderIf setText LabelFinalResult FAILURE Some kind of error occured: Unable to build kdenlive
KBWTRACE: Entering cmd @ = dcop kmdr-executor-28210 KommanderIf execute ScriptObjectDone
KBWLOG: About to run command: dcop kmdr-executor-28210 KommanderIf execute ScriptObjectDone

I think this is, what I have dubbed, "The Infamous Cmake Error".

To resolve it, please enable the "backports" repository in Synaptic, then do a "sudo apt-get update; sudo apt-get upgrade" and rebuild using the wizard.

Regards

Mads