BUG : Sometimes, pieces are left outside of their normal place. Must
      either fix or provide a 'redraw' function (not recently
      2001/07/11).

BUG : Occasional perl seg fault when exiting (not recently 2001/07/11).

BUG : Pieces of same shape but different color are considered equal.

BUGLET : Should redraw data/c27d.fgimage.png so that it looks better.

TODO : Be able to resize puzzle.

TODO : Shrink the undo/redo sections in .lev files.

TODO : Fast forward/backward

TODO : Better support for sparse puzzles, in which diagonal motion
       should be possible.

TODO : Better document .lev format

TODO : Image support so that .dat files (as found on Nick Baxter's
       page) can be loaded

TODO : Background image should be drawn

TODO : Tidy up code

Please send me (etienne@isr.ist.utl.pt) messages about any bug not
listed here that you may encounter.