Weird error in log after installing MailScanner

[Mack Ragan]

Hi!

I am getting this weird error in /var/log/messages since installing
MailScanner 4.11-1.  Also, MailScanner really hogs the cpu, and eventually
the host runs out of memory and MailScanner dies (or is killed).  Here's
the error:

Jan 29 09:40:47 lx2 kernel: Trying to vfree() nonexistent vm area (c88c6000)
Jan 29 09:40:48 lx2 kernel: c4e65ea4 c03006c0 c03006c0 c03009c8 00000003
c7e92820 00000000 c4e64000
Jan 29 09:40:51 lx2 kernel:        0000000b c0119419 c7e92820 00000206
c7e92820 c011e026 c7e92820 c15322dc
Jan 29 09:40:52 lx2 kernel:        c4e64000 00000000 c4e65f30 0000000b
c012438c 0000000b c0124574 0000000b
Jan 29 09:40:53 lx2 kernel: Call Trace: [<c0119419>] mmput [kernel] 0x39
(0xc4e65ec8))
Jan 29 09:40:53 lx2 kernel: [<c011e026>] do_exit [kernel] 0xa6 (0xc4e65ed8))
Jan 29 09:40:54 lx2 kernel: [<c012438c>] sig_exit [kernel] 0xac
(0xc4e65ef4))
Jan 29 09:40:54 lx2 kernel: [<c0124574>] dequeue_signal [kernel] 0x64
(0xc4e65efc))
Jan 29 09:40:54 lx2 kernel: [<c0108eb7>] do_signal [kernel] 0x1f7
(0xc4e65f14))
Jan 29 09:40:55 lx2 kernel: [<c01249e1>] deliver_signal [kernel] 0x31
(0xc4e65f68))
Jan 29 09:40:55 lx2 kernel: [<c0109c10>] do_general_protection [kernel] 0x0
(0xc4e65fa0))
Jan 29 09:40:55 lx2 kernel: [<c0124e5f>] force_sig [kernel] 0x1f
(0xc4e65fa8))
Jan 29 09:40:55 lx2 kernel: [<c0109c10>] do_general_protection [kernel] 0x0
(0xc4e65fb8))
Jan 29 09:40:55 lx2 kernel: [<c0109160>] signal_return [kernel] 0x14
(0xc4e65fc0))

Any thoughts as to why this is happening?

Thanks!
Mack