Grimrock

In the skyway room, I remove the items from the pressure plates so that the door opens and I can go up the ladder to look down on that same room. I drop a rock and a sparkle floor tile appears in front of me. As soon as I move forward I fall through the tile and back to the room below. Is this a bug? Or am I doing something idiotic?

Thanks!

Sounds like a bug for sure, you're supposed to walk on those glowing tiles when they appear. Post about it in support forum.

Yeah this is a bug. it happens when you have stones equipped. Just equip something else and leave the stones in your inventory so that you can solve this riddle.

Good Luck.

Edit: Nevermind. This has been answered in your other thread:
http://www.grimrock.net/forum/viewtopic.php?f=21&t=7477