hi! I just built as the wikipage says, but I only installed the built kdesvn_0.14.1-1_amd64.deb (kdesvn-kio-plugins_0.14.1-1_amd64.deb, libsvnqt4_0.14.1-1_amd64.deb and libsvnqt-dev_0.14.1-1_amd64.deb were built too). kdesvn now starts fine, so with the self-built binary, the problem doesn't exist (I didn't start it with gdb yet).
jürgen