Gnucleus (debug build 27/8/2001)
Using Windows 2000 SP2 Build 2195
Dual Celeron 300a@450
256Mb Ram
Cable Modem

Problem seems to be related with ports and or an rouge Peer sending some corrupt data also... the strange thing is only win2k+ is having this problem...

Stack
memcpy(unsigned char * 0x01b26e71, unsigned char * 0xdddddddd, unsigned long 398) line 216

code
LeadUp1:
and edx,ecx ;U - trailing byte count
-> mov al,[esi] ;V - get first byte from source
mov [edi],al ;U - write second byte to destination
mov al,[esi+1] ;V - get second byte from source

asm
10219932 mov al,byte ptr [esi]

PS:
Please try to read GDF from time to time...
Go to the database area (GDF To Do List) and see the references to the "GNet query/reply filtering"
And if possible post 0.6 protocol in the file area if you got it...