Odd. This worked in B4 but not B5.

markasread { var %i = 1 | WHILE ($scon(%i)) { scon %i | var %j = 1 | WHILE ($window(*,%j).wid) { window -g0 @ $+ $v1 | inc %j } | inc %i } }

...

Actually, many of my scripts aren't working.

Well. At least I won lunch.
Good philosophy, see good in bad, I like!