reproducible memory problem and crashes on cygwin

[emacs user]

this problem leads to consistent and reproducible crashes of emacs.

using latest cvs gnu emacs (22.0.50) on latest cygwin.

start with
emacs -q --no-site-file&
edit a jpeg file
kill buffer
edit another jpeg file
kill buffer again.

every such jpeg file edited and exited leaves the memory used by emacs (as 
seen in the list of processes of the windows task manager) increased.  
Memory does not decrease once buffer with image is killed.  when a text file 
is edited and exited, the memory does return to its original size.

EU

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