I have a Velbon Victory 451 consumer grade tripod. It's a good 10 years old, but lightly used and in good, almost like new, condition. But I've been having trouble with getting the camera to mount on the tripod so that it doesn't rotate on the base. It's almost as if the tripod socket on the camera isn't deep enough for the attaching screw to get a good grip. This has never been an issue with any of my other cameras and this tripod. Anyone else having tripod issues? If not, what sort of tripod (brand and model) are you using?