Well, I thought my semi-favorite analog TEK scope was going flaky. Turned it on and what should have been a horizontal trace looked like a haystack. The text dealibobbers on the screen were all warped too..so I figured it was some kind of power supply issue. As it turned out, one of our visiting rugrats had left a small speaker magnet on top of the scope. Removed the magnet and the trace straightened out. So....if you've got a warped sillyscope trace, look for new sources of magnetism. p.s. I do encourage the rugrats to twiddle all my knobs...so no harm no foul.