Protractor Won't Select From Drop-Down in IE10

For tests run on firefox and chrome, I often use a command similar to the following to select a particular option from a select2 drop-down menu:

element(by.cssContainingText('.select2-result-label', 'A')).click();

In firefox, you can see that it selects the item from the list. In IE, I can see the list drop down, and then it's like the cursor just flies up and down the list for a moment, but never seems to light on the right item and never selects anything.

Has anyone else seen different behavior with menus in IE and firefox?