Doomsday Engine

I´m using the latest jDoom with the latest wads and
drivers under WinXP.
However using 2 PCs to play in cooperative mode, the
game crashes often under various conditions:

Joining a server with the .md2 model pack enabled
(sometimes)
Starting a server then closing it and starting a new
one (always)
Playing a netgame and then exiting jDoom (always)
Playing a netgame then disconnecting and reconnecting
(sometimes)

The game never crashed on any of the 2 pcs in
singleplayer-mode (with -nofmod)

Generally network playing is very unstable. I hope this
could be improved :)

I´d like to help in tracing down the problem, perhaps
with a debug build.