Quad core duo 2.4Ghz (Q6600) Kernel 2.6.18-53.1.14.el5PAE #1 SMP 4Gb RAM VirtualBox-1.5.6_28266_rhel5-1.i586.rpm The package installed OK. I did KERN_DIR=/usr/src/kernels/2.6.18-53.1.14.el5-i686 /etc/init.d/vboxdrv setup and the module compiles AOK. BUT... at modprobe time: vboxdrv: disagrees about version of symbol struct_module Am I doing something stupid? -- rgds Stephen