The Bad Request response issue is definitely fixed by the linked branch. I'm seeing much more robust behavior now.
We still have an issue with the error back-off being too aggressive when an individual request to the server times out. I'll work on that and try to get this into OTA-9. We have a separate bug for that problem: https://bugs.launchpad.net/ubuntu/+source/thumbnailer/+bug/1528105 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to thumbnailer in Ubuntu. https://bugs.launchpad.net/bugs/1512608 Title: No thumbnails generated for OGG audio Status in music-app package in Ubuntu: Invalid Status in thumbnailer package in Ubuntu: Fix Committed Bug description: Setup: Core Music app BQ HD5 OTA-7 15.04 r6 Large collection of audio files in .ogg and .mp3 format on SD card Audio files tagged with Artist, Album titile, Track title etc. Expected result: Album covers and Artist images are displayed in Music app Actual result: Only mp3 audio files generate thumbnails. No Album of Artist thumbnails are generated for any OGG files To test the situation I have a) Cleared the thumbnailer failure cache b) removed the whole thumbnail cache directory c) Removed and reinsterted the SD card d) Uninstallled and reinstalled the core Music app Before the OTA-7 upgrade the thumbnails were shown for .ogg and .mp3 files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/music-app/+bug/1512608/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp