- I checked the permissions on moodledata/lang
- The server can contact the internet (download.moodle.org pingable). The downloaded language files even end up in my moodledata/temp folder.
- I checked the path to zip/unzip (other zip/unzip features like backup work)
- I checked the modified date of langimport.php and it is the latest version
- I searched and did not find related open bugs in the tracker
- I'm not behind a proxy, so I assume MDL-8653, MDL-8752 are not applicable.
Anyone an idea what else to look at?