Ran a routine weekly update on an arch box this morning, didn't think anything of it as usual. Until Thunar started spitting errors at me whenever I tried to mount a USB device. gvfs makes the devices appear in the left pane for one-click mounting... usually.
A partition on the hard drive attached has started telling me I don't have permissions to mount it any more - never had issues before, I'm in the storage user group so I don't see why.
The other issue comes with a USB hard drive, and when trying to mount it as above, Thunar throws this at me:
Error mounting /dev/sdb1 at /run/media/pip/HD-PVU2: Command-line `mount -t "vfat" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid-100,shortname=mixed,dmask=0077,utf8=1,showexec" "/dev/sdb1" "/run/media/pip/HD-PVU2"' exited with non-zero exit status 32: mount: unknown filesystem type 'vfat'
Searching both pacman and AUR gave me no packages to do with vfat filesystems, and the wiki article "USB Storage Devices" provided no solutions at all.
Using XFCE4 DE on 32-bit Arch. All packages have been updated to latest versions as of the time of this post. A reboot has been done since the update due to a kernel update, but the problem continues to persist.