When the ip_conntrack module is loaded on recent 2.6 kernels, such as 2.6.6 and 2.6.7, and one tries to access an SFS mount or a simple localhost NFS mount, the kernel will spit out ip_conntrack_in: Frag of proto 17 (hook=0) repeatedly as the process attempting the access will hang. This problem does not appear to occur with Linux 2.6.5 or earlier, and using 2.6.6 or 2.6.7 without ip_conntrack works as expected. What gives?