As expected

Opera found a problem: It looks like a bad cable. Even if this is the answer, it still has to be checked, of course.

UPDATE: This morning's report says they found a problem in an oscillator (that "clock tick" I wrote about earlier) that would make the effect go in the other direction: faster. The report doesn't estimate the size of the effect, leading me to suspect that it is small and has probably been known about for some time. It lets them balance the report, though. But I could easily be wrong; it is hard to keep a secret in this field. (Scientists like to find out new things and then tell everybody about them; it's one of their big motivators.)