I've attached my basic mod file. There's a line in rooms.xml for the test room. Some items appear. Others don't. And I have no idea why.
If I use a working sprite for the other items, they appear. The only thing I can think of is that the program I used to palette shift the pngs for those sprites did something, but the bows work fine and I shifted them too.
try structuring the path for item graphics under a same file structure as the game. IE sprites for items all in a folder "items" and sprites for skills all in a folder "skills"
Okay, found the problem with jaybud's help: malformed comment did some beezar stuff. Largely fixed, testing some other items...