[GEM-dev] particle system : bug ?

[pierre]

Hello all,
I use pd+gem a lot for doing audio/visual live show
Thanks to all developers to keep it amazing
Yesterday i was trying particles system and experienced a 'bug' with the 
patch /Gem/06.particles/07.render.pd
pd crashes when i try to increase particles with [part_source], and/or 
by increasing [part_killold]

im using  Pd version 0.40-3extended-20080127, compiled 01:40:32 Jan 27 
2008, under ubuntu feisty with nvidia proprietary drivers

is it a bug in GEM or elsewhere (pd-extended nightlybuild...) ?

and another question :
which is the right way to report a bug ? (howto?)
is this list appropriate ?


Logs :

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PD console :
GL : stack underflow
(never seen this before!?)

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GDB output :
rep at sushiboook:~$ gdb pd
GNU gdb 6.6-debian
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain 
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(gdb) run
Starting program: /usr/local/bin/pd
[Thread debugging using libthread_db enabled]
[New Thread -1211763008 (LWP 13251)]
tk scaling is 1.6821192053
[New Thread -1240523888 (LWP 13257)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1211763008 (LWP 13251)]
0x080a9779 in pd_typedmess (x=0x82acc18, s=0x823a0c8, argc=2, 
argv=0xbfeccf30)
    at m_class.c:691
691     m_class.c: No such file or directory.
        in m_class.c

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thanks,
pierre