Level-d's ANALOG.XM playsback with some high frequency aliasing. This does not occur in other mod players.
Moplayaz KRI#HOLD.IT plays back with bad static at the end of one sample.
Fridge's EHA-808.XM will hang Winamp on attempting to load into the playlist. This will happen either through "Add Dir" or Drag and Drop. You get the White border around the main Winamp window. http://zerion.com/fridge/1999/fdg-007.zip
These can be played on
Fastracker 2.08 (where appropriate)
MikIT 1.00 Beta
OpenCubic Player 2.60
MODPlug Player 1.42
There is a more up-to-date version of the MikMod player at: