A continuation of Bothorth's work of graphic fixes:
http://aok.heavengames.com/blacksmith/showfile.php?fileid=10451
Instructions
Use the DRS Editor in Turtle Pack and replace “354.slp” (Found in graphics.drs, Data folder in the Age of Empires II installation directory) with “354 (Mameluke - Fixed Shadow).slp”, save and exit.
Note: You can also use these graphic fixes on the HD version.