Actually, now that I get into your tileset and look at your MC water, your diagonals seem perfect to me. The only thing they're missing is a variant tile.
But it does seem that you're missing the 1-block wide tiles (which I don't believe exist in the regular MC tiles), and some of those are what I'm missing as well.
I'm going to complete the stuff I'm working on, but I'd like to ask your permission to grab the diagonals from your tileset and add them to my tile pack. If that's not ok with you, then I understand.
EDIT: Found some errors with your tileset. Here's what I've got so far:
1- The dungeon wall combos at page 79 are mismatched.
2- The dungeon combos at page 79 and 91 are the same set
EDIT 2: I believe I have the set completed. Here you go:
(removed for incompleteness)
Credit to Shane and Moo2wo for the diagonals. the other mountain borders are mine
EDIT AGAIN: Damn. Every time I think I'm done with these, I find something else that's missing. Here is the completed set (hopefully)
Edited by Master Maniac, 09 May 2014 - 04:16 AM.