We've not changed anything at this end, but we haven't tested it the Ubuntu so I can't confirm whether or not it is supposed to work. Is it possibly a permissions setting at your end?
I thought it might have been because I was trying to upload an image stored on the Windows HDD but copying it across into an Ubuntu folder didn't help. So, until that 'bug' is fixed, I guess I'll have to upload it to Photobox or whatever and load it from there.