Trying to fix my !gnusocial image embedding problem, I've moved to a fresh install of the nightly build and run the following commands:
scripts/stopdaemons.sh
git pull
cd plugins/Qvitter/
git pull
cd ../../
php scripts/upgrade.php
php scripts/checkschema.php
php scripts/clean_file_table.php -y
php scripts/delete_orphan_files.php -y
php scripts/remove_duplicate_file_urls.php -y
php plugins/OStatus/scripts/fixup-shadow.php
php scripts/fixup_deletions.php
php plugins/OStatus/scripts/update_ostatus_profiles.php -a
php plugins/Oembed/scripts/fixup_files.php
php scripts/clean_thumbnails.php -y
php scripts/upgrade.php
scripts/startdaemons.sh

Still no luck. This is not a mastodon compatibility issue, since the image I posted to this account is also not embedding correctly.

The oemebed plug in enabled via the GUI. Should there be something about it in the config.php file?