One of my users has reported that she can no longer put an uploaded file on the stack. She's been using the system for a couple of years without problems but now something seems to have changed. I tried too, both with her file and with a different file. No go.
Just to be clear, the file has successfully been uploaded to a folder. But now when I click 'place on stack' nothing happens.
It's not a huge file (230K and the server isn't out of space as far as I can see - I tried removing a few files, and it made no difference.