Field content lost when changing creator role

[ajlyon]

When I enter content into an item field, say ISBN, then immediately click on the creator role drop-down to change the creator role (say, from "Author" to "Editor"), the data entered in the item field is lost (that is, the field loses focus but is empty after I click on the dropdown).

I imagine this is a click sequence that was somehow overlooked. This is in the most recent multilingual build, but it may be the case in the trunk as well; I haven't checked.