Steps to reproduce
1. In the 'Files' App go to a folder with pictures.
2. In the list are only the standard icons for pictures and not the thumbnails, which I had in earlier versions of OC.
See the thumbnails to the left of the file name.
Only standard icon is shown.
Operating system: Debian 8.7
Web server: Apache 2.4.10
Database: MySQL 5.5.54
PHP version: 5.6.29
ownCloud version (see ownCloud admin page): 184.108.40.206
Updated from an older ownCloud or fresh install: Updated
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption): No
Integrity status for oC9+
Login as admin user into your ownCloud and access http://example.com/index.php/settings/integrity/failed paste the results here.
No errors have been found.
Preview is enabled in the config.php. All other kind of previews and normal views with the gallary app are working without problems. It is just, that there are not thumbnails shown, when I am looking at the files as listing. Has been working always before.