In halog 268106 there is a gap in the U2 wire hit map around channel 340. It seems to have corrected itself in halog 268282.
Note that there was (is?) one card with a bad threshold connection: halog
267935. In that entry Jack says it "had" a bad connection -- does
that mean he fixed it? (Or is that repair still queued up for the next
Beam Studies?)
A copy of this log entry has been emailed to: segal, vasulk, bogdanw