Clicking on Ajax tab while another ajax tab is loading

If one ajax tab is loading content, and then you click on another ajax tab, the following occurs:

The first ajax tab's content loading is stopped (the content div is left empty), but the tab keeps the ui-tabs-selected class.

The second ajax tab's content is loaded properly and it also has the ui-tabs-selected class.

The final result is one tab that shows up as being selected, and that has no content, nor will ui.tabs load it for you.