TEMPORARY SOLUTION (while ubuntu releases a new kernel package): Guillermo Pérez and me solved this compiling a new kernel (2.6.18.5) and installing it. For all the people that find difficult to do that task, or doesn't want to loose time compiling, i'm hosting for a while a compiled kernel. You only have to donwload and install:
1) Visit http://www.eurielec.etsit.upm.es/~chesko/nfs_solution and download the two deb files 2) install them with dpkg -i <name_of_the_file> 3) check if your /boot/grub/menu.1st is properly modified 4) reboot 5) enjoy Instructions on how to easily compile the kernel can be found at http://www.howtoforge.com/kernel_compilation_ubuntu -- Permission Denied on nfs clients for only some files https://launchpad.net/bugs/62308 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs