bug#10277: 24.0.91; memory leak when using vm

[emacs user <user.emacs@gmail.com>]

In GNU Emacs 24.0.91.1 (x86_64-apple-darwin11.2.0, NS apple-appkit-1138.23)
 of 2011-11-25 on MacBook-Air.local
Windowing system distributor `Apple', version 10.3.1138
configured using `configure  '--with-ns''

when using vm, emacs grows in size every time I read my inbox, and
eventually crashes.  garbage-collect has no effect.  memory-usage.el
gives the output below, I would be grateful for any hints on how to
identify the problem...

[at the time of this report, emacs grew to about 200mb (using activity
monitor on the mac).  it's initial size was about 30mb. ]

\Garbage collection stats:
((470940 . 228143) (128755 . 1) (348632 . 1073) 9089641 3274519 (123 .
1083) (4119 . 14324) (691547 . 38503))

 =>	7535040+3650288 bytes in cons cells
	6180240+48 bytes in symbols
	13945280+42920 bytes in markers
	1968+17328 bytes in floats
	230664+802144 bytes in intervals
	22129504+1232096 bytes in string headers
	9089641 bytes of string chars
	9089641 bytes of vector slots

Total bytes in lisp objects: 68131680 (live 62386856, dead 5744824)

Buffer ralloc memory usage:
10 buffers
10404 bytes total (9887 in gaps)
      Size	Gap	Name

       568	1572	*Buffer Details*
        20	2045	 *Echo Area 1*
        17	3	 *Custom-Work*
         5	2020	 *code-conversion-work*
         0	20	*scratch*
         0	2037	 *Minibuf-1*
         0	20	 *vm-nonexistent-summary*
         0	20	 *Minibuf-0*
         0	2037	 *Echo Area 0*
         0	20	 *subst-char-in-string*