The half-assed 'identify the symbol' contest? I took the photo at an angle to fit the block and paper into the photo:
Mentally rotate the symbol, uh, forty-five degrees? The straight 'legs' of the 'cross' should be at a diagonal, so that it's an X, not a + sign. Didn't mean to deliberately obscure it, I just clicked the photo in my usual half-assed way. (Obviously, since it's blurry.)
And as of, uh, noon-thirty today, no one's attempts to identify the symbol have come close. (This qualifies as a second hint.) Though they're interesting. Since people are getting serious about this, let me add a rider to the rules: First person to identify gets the loot. Though if more than one person identifies it, I'll be so shocked I'll probably give out loot to anyone else who gets it, too, unless there are fifty of you. Contest ends, what, next Saturday? That gives you guys a week to research.