Update to 0.90.86 (2013).  Notable changes:

Milkyplay license changed from GPL to BSD (MilkyTracker remains GPL).
LHA, gzip and LZX compression support.
Colour table import/export.
Unsafe notes now shown in red when "PT 3 octave limit" option enabled.

Bug in xm loader for old xm variant causing 8 bit samples to not load correctly.
Crash when MilkyTracker attempts to load a non-existant file.
Instrument vibrato depth value gets doubled when copying instruments.
Loss of data when using 'backward' sample filter.
Crash when storing colour presets.
Segfault when loading XMs with zero-length loop.

(shattered)