The leech options under the "Discard" area don't work at all. No matter how I set it, it leeches every single tile, even duplicates when told to discard them. This happens in both 4-bit and 8-bit modes. Its been this way for a while, but I thought it might have been the pic I was leeching from. I've tried with a whole assortment of pictures, and none of them deal with the duplicates properly. Also, I'm in windowed large mode if that matters.
[984]Leech "Discard" Options Don't Work
This thread included a poll: Is a fix for this needed before 2.5 is released?
To be honest I don't think the duplicate settings have ever worked. (At least I could never get them too) I always assumed it was not completed yet. :shrug:
They did work at one point. I think this was before the addition of 256-color tiles, though.