After upgrading to 1.38.0 from 1.37.2, new JPG images are not having thumbnails created. The file page shows a white box and a size of 0x0 pixels. PNG files work as expected. The original file is uploaded successfully, as accessing the file directly through the webserver displays it correctly.
What I've tried to far:
- Looking for obvious PHP or webserver errors. I don't see anything.
- Switching from Imagemagick to gd. Same results.
- Confirmed that the images and images/thumb directories have the proper permissions. Yes, they are 755 and owned by the appropriate user.
- Turned on $wgDebugLogFile to find more details. This is where it gets interesting. For PNG files, I can see where it tries (and succeeds) in generating thumbnails. It calls out to /usr/bin/convert as expected. For JPG files, these lines are nowhere to be found. It's like it's not even trying to create a thumbnail.