I didn't crash with:
alias testcrash dcc chat 127.0.0.1:1 | dcc chat 127.0.0.1:1
On *:close:=: window -c =$nick
XP Home, AMD XP 2400+, 1Gig ram, mIRC v6.16 & v6.15
--
Sounds to me like Khaled is deleting the array stack prematurly. Gotta love allocating dynamic arrays ;d