Thread:Project:Support desk/Upgrade 1.8.2 to 1.22 pictures missing/reply

For problem in #2, you may need to disable $wgHashedUploadDirectory, which is enabled by default. But I don't know if it would start giving you errors of #1.

The error "can not save thumbnails in the destination directory" may be a filesystem permission problem, or upload/thumbs directory misconfigured.