5th weekday of the month.
bottle.washer says:
Some months have 5 of some weekdays, for example, April 29, 2008 is the 5th Tuesday. When I try to create a task that repeats on the 5th Tuesday the result reverts to once per week. Not what I'd expect.
(closed account) says:
bottle.washer, probably want to post this in the "Help" forum -- which is where bug reports go. I don't think the RTM folk monitor this forum for bugs -- they may occasionally canvas the ideas listed here, but I've seen no sign of any implementation of ANY of the few hundred thousand ideas people have posted here ... anyway long story short, bugs are paid attention to if they're posted in "Help", but not if they're posted here.