I'm using Onyx every so often when things start to get sluggish. Recently, things keep flying out of whack for no obvious reason. Like, USB ports stop working, or icons won't load. When I run Onyx, it tells me that the startup volume needs repair. I'll put in the Snow Leopard disk, repair the startup volume and return to Onyx, which then says everything is fine and goes about its business. Then, after not too long, things fly out of whack again and I'll need to repair the startup volume again. What causes the startup volume to need repair? Is there some way I can avoid this kind of thing? Is there something I'm doing that's making this happen? Any advice would be helpful. This would be an obnoxious problem to try and recreate for the Apple store people. Taking it in there, they'll probably just repair the startup volume and send me on my way.