I work at a school with Macs (10.4.11) running Elements 4.0 and occasionally Elements will crash leaving the file that was opened and saved wrecked. When you try to open it, it says either the file ended unexpectedly or that it is empty.

Any ideas?

My first thoughts were that we are seeing this error more (just once last year) because the students were saving to a shared "public" folder instead of to their network home desktop.