Yeah, the "rf-" tag pinpoints that it's produced by my mod. There must be some item called "burner-ore-crusher" added by a third mod (one of angel's, I think), which has a reverse recipe made for it in my mod, but then the original recipe is removed, leaving the reverse recipe with no ingredient. Or something like that. I'll have to take a look at how these 3(+) mods interact to track down the problem. May I have your modlist to help locate the issue?
