Windows (filezilla) to Linux copy.
Please provide additional information about the problem as well as information about your system (kernel and ssh versions for starters). Please provide the exact steps taken to reproduce the problem.
F9 + autoupdate means: openssh-5.0p1-3.fc9.i386 2.6.25.14-108.fc9.i686 Filezilla 3.1.1.1 on Windows Vista. Can't give you steps to reproduce, but I expect if you copy a lot of isos from Windows to Linux it will reappear. I don't have the disk space to do this atm.
Where do you see the message? Seems like out of memory condition but it might be caused by other processes. Also we now have openssh-5.1p1 in F9.
Unfortunately I cannot reproduce this intermittent problem so I am unable to fix this.