Description of problem:
on boot

Additional info:
WARNING: at fs/inode.c:280 drop_nlink+0x46/0x50()
Hardware name: Bochs
Modules linked in: ipt_MASQUERADE nf_conntrack_netbios_ns nf_conntrack_broadcast ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat nf_nat iptable_mangle nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack bnep bluetooth rfkill ebtable_filter ebtables ip6table_filter ip6_tables be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i cxgb3 mdio libcxgbi ib_iser rdma_cm ib_addr iw_cm ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_page_alloc snd_timer i2c_piix4 snd i2c_core microcode soundcore virtio_balloon joydev uinput 8139too 8139cp virtio_blk virtio_net mii sunrpc
Pid: 1014, comm: lightdm Not tainted 3.6.10-4.fc18.x86_64 #1
Call Trace:
 [<ffffffff8105c8df>] warn_slowpath_common+0x7f/0xc0
 [<ffffffff8105c93a>] warn_slowpath_null+0x1a/0x20
 [<ffffffff811a99d6>] drop_nlink+0x46/0x50
 [<ffffffff81218abb>] ext4_dec_count.isra.23+0x1b/0x30
 [<ffffffff8121d007>] ext4_rename+0x337/0x930
 [<ffffffff81286f64>] ? selinux_inode_rename+0x134/0x180
 [<ffffffff8119eaf1>] vfs_rename+0x361/0x4a0
 [<ffffffff811a1272>] sys_renameat+0x1d2/0x210
 [<ffffffff8117b059>] ? kmem_cache_free+0x39/0x130
 [<ffffffff810d8d5c>] ? __audit_syscall_entry+0xcc/0x300
 [<ffffffff810d937c>] ? __audit_syscall_exit+0x3ec/0x450
 [<ffffffff811a12cb>] sys_rename+0x1b/0x20
 [<ffffffff8162bae9>] system_call_fastpath+0x16/0x1b

Potential duplicate: bug 860961