I get the same error here under the same circumstances.
Usually when Browsing All with other users images uploaded.
Was there any resolution?
I’m running 2.04 and still have the problem.
This is probably related to my servers hard disk filling up over the weekend… All appears to be working again now. Although the site pages needed to be republished before they re-appeared.
Have closed this as resolved. It might be usefull for others..
The main posts have come back up, but the site pages were still giving an error 404.
I was able to log into the admin area, open the site pages and resave them, which has brought them back.
Good to see them back, but wish I knew why they disappeared.