> good news: it was easy to reproduce. bad news: i'm having difficulty
> isolating the problem. a workaround that may or may not help you is
> to use something like a checkbox list. i'm a bit baffled right now
so
> it may take me some time to figure out what i hosed up.

Any progress at all? Unfortunately I don't have the screen space to
use a checkbox list as there are a lot of options in each dropdown and
several dropdowns on the page. So a fix would be most welcome.

In fact the fields in question do not actually require validation, so
if you were able to allow multiple selection with validation disabled
for those fields then that would be a possible work around for me in
the short term.

Graham