When slecting from available desktops installed, the Back button is just labelled button as far as Orca is concerned, the expected label is 'back'.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: lightdm 1.9.5-0ubuntu1
ProcVersionSignature: Ubuntu 3.12.0-2.7-generic 3.12.0
Uname: Linux 3.12.0-2-generic x86_64
NonfreeKernelModules: btrfs raid6_pq xor ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c reiserfs ext2 btusb joydev hid_generic snd_usb_audio usbhid snd_usbmidi_lib hid snd_hda_codec_realtek snd_hda_codec_hdmi bnep rfcomm bluetooth x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd ppdev snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi psmouse microcode serio_raw snd_seq i915 snd_seq_device snd_timer drm_kms_helper snd drm lpc_ich mei_me soundcore i2c_algo_bit parport_pc mei mac_hid video pcspkr lp parport speakup_soft speakup r8169 ahci libahci mii
ApportVersion: 2.12.7-0ubuntu4
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Jan 6 18:26:07 2014
InstallationDate: Installed on 2013-11-14 (52 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131113)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)
This bug was fixed in the package unity-greeter - 14.04.2-0ubuntu1
---------------
unity-greeter (14.04.2-0ubuntu1) trusty; urgency=medium
* New upstream release:
- Handle a window being destroyed after we get the map event and try and
focus it (LP: #1048131)
- Add accessible description to back button (LP: #1266366)
- Fix attempted removal of dead source
- Apply the same unity color corrections to the average color in shutdown
dialog
-- Robert Ancell <email address hidden> Wed, 05 Feb 2014 10:01:12 +0000