Compilation from git fails with: xfce4-clipman-settings.c:37:32: fatal error: settings-dialog_ui.h: No such file or directory compilation terminated. My workaround is to copy file panel-plugin/settings-dialog_ui.h from last release tarball to my git tree. I suppose this file is just missing, no?
Nope, it's build automatically, but make sure to run the configure script with the --enable-maintainer-mode flag (which is set automatically when running the autogen.sh script.)