I had the same problem on my 64 bit system. I found that the (old) davfs2_0.2.8-1build1_amd64.deb works perfect!
-- mounting using davfs not possible on Ubuntu 6.10 https://launchpad.net/bugs/70787 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs