I found the same issue with 1943 and I have tried a 68010 and plain 68k with no luck (oddly it works fine in WinUAE):
16.9:
17.0:
After discussing it with a few others it was determined that the a1200 was the target machine for many WHDLoad mods.
http://www.amibay.com/showthread.php?t=40024
http://www.amiga.org/forums/showthread.php?t=63951
http://eab.abime.net/showthread.php?t=67542