I've attached the kernel message log from a GPF that occurred running the Debian kernel package of kernel 3.13.4. This happens repeatedly and started doing so with Debian kernel 3.12.8. This is not the first time I've seen a filesystem corruption occur related to Kmail files that causes a kernel panic. I wonder if Kmail has some file access pattern that triggers a BTRFS bug. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/