--- ltsp_nbd.bak	2010-01-05 15:32:43.000000000 -0500
+++ foo	2010-02-03 10:58:07.024799873 -0500
@@ -64,7 +64,7 @@
     mkdir -p /rofs
 
     # create tmpfs for writeable files
-    mount -t tmpfs tmpfs /cow
+    mount -t tmpfs -o mode=0755 tmpfs /cow
 
     # mount the readonly root
     if nbd-client ${NBD_ROOT_SERVER} ${NBD_ROOT_PORT} /dev/nbd0 ; then