When I symbolize a layer by setting the "Use:" value to "Size," and then clicking on 1 of the symbol classes in the symbol panel, the "Change Label and Symbol" dialogue will allow me to change the "Label:" value once. If I try to perform the same workflow for the same layer (or on other layers) more than once, the "Change Label and Symbol" dialogue will not allow me to click "OK."
This issue is occurring in Chrome (32.0.1700.107), IE (10.0.9200.16750), and Firefox (27.0.1)
The only workaround I have at the moment is to save my map and refresh the page. Anyone else having this issue?