mtpfs fails to view files on phone, gives libselinux1 error

In 12.04, mtpfs worked fine to mount my Galaxy Nexus phone, browse and copy files. However, in 12.04, after mounting the phone ok, attempting to browse the directory structure just results in a libselinux1 error:

$ ls
ls: error while loading shared libraries: libselinux.so.1: cannot read file data: Error 21

ldd confirms that libselinux is present and correct, and I've resinstalled the libselinux1 package to make sure.

$ ldd `which mtpfs`
 linux-vdso.so.1 => (0x00007fffb1bff000)
 libfuse.so.2 => /lib/x86_64-linux-gnu/libfuse.so.2 (0x00007ffd3609e000)
 libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007ffd35da7000)
 libmtp.so.9 => /usr/lib/x86_64-linux-gnu/libmtp.so.9 (0x00007ffd35b54000)
 libmad.so.0 => /usr/lib/x86_64-linux-gnu/libmad.so.0 (0x00007ffd35934000)
 libid3tag.so.0 => /usr/lib/libid3tag.so.0 (0x00007ffd3571b000)
 libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007ffd354fd000)
 libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ffd3513e000)
 librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007ffd34f36000)
 libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007ffd34d31000)
 libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007ffd34af4000)
 libusb-1.0.so.0 => /lib/x86_64-linux-gnu/libusb-1.0.so.0 (0x00007ffd348e2000)
 libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007ffd346ca000)
 /lib64/ld-linux-x86-64.so.2 (0x00007ffd36308000)

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: mtpfs 1.1-2
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
Date: Tue Oct 23 14:39:41 2012
SourcePackage: mtpfs
UpgradeStatus: Upgraded to quantal on 2012-10-23 (0 days ago)