With the new design of Codeplex I'm getting an error when trying to change the planned release of multiple work items using the advanced view.

Steps to duplicate:

1. Go to issue tracker-advanced view
2. filter issues by status=active or status=proposed
3. check some issues
   5 select planned release-change
4. in the popup window change the planned release by clicking the radio button
   The screen turns grey with no response and the planned release is not update if I refresh my page
   

Additional info: I'm using the Firefox web browser. This feature worked perfectly before codeplex updated to the new gray/violet design style.

Thank you in advance for looking into this issue!