>> I downloaded this and tried it. It worked fine for me on my x86 FC4 >> machine. Colin> Hmm, I got: Colin> jUploadr-0.6-linuxGTK-i386 Colin> My machine is an x86 Me too. The undefined reference to this symbol comes from the libswt-pi-gtk-3062.so that comes with jUploadr. The symbol is supplied by /usr/lib/libglib-2.0.so.0. If you run ldd on the swt .so you should see that this is how libglib is resolved. Tom