I ran into a problem mounting my new Arduino Mega. The mounting holes are so close to the connectors that there isn't room for even a #4 machine screw. The screw can't extend beyond the top of the on board sockets or it will interfere with the connections. This board will be mounted on a flat surface along with 8 or 9 other boards that it will be driving.
So has anyone just used some RTV silicone glue to mount an Arduino? I'd just put a bead of adhesive directly under the connectors. It would be a pretty permanent mounting, but that's what I expect it to be. to remove it I'd have to cut through the adhesive with a razor.