While I've seen the threads about static shocks from the "new" aluminum keyboard, I've got a slightly different issue. When I plug in my bass to the amp, if I have one hand on the strings, and the other hand touches the keyboard, I get a shock. Maybe shock isn't the right word - I can actually feel the current passing through. It's not a very powerful one, but it's enough to be uncomfortable. The amp is grounded. I haven't had any electronic problems with the bass at all. Any ideas?