gdb does not remove breakpoints on detach

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

how to reproduce:

% sleep 100 &
[1] 4279
% gdb sleep 4279
GNU gdb 6.7.1
Copyright (C) 2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i386-dragonfly"...
Attaching to program: /bin/sleep, process 4279
0x0804900f in nanosleep () at nanosleep.S:2
2       RSYSCALL(nanosleep)
(gdb) n
^C
Program received signal SIGINT, Interrupt.
0x0804900f in nanosleep () at nanosleep.S:2
2       RSYSCALL(nanosleep)
Current language:  auto; currently asm
(gdb) q
The program is running.  Quit anyway (and detach it)? (y or n) y
Detaching from program: /bin/sleep, process 4279
[1]  + trace trap (core dumped)  sleep 100