Hi,
we are running a Jira instance (v5.2.10#853-sha1:c0ba268) since a view years now properly.
Today we got totaly mixed up screen on the agile board within Chrome and also on IE.
Funny thing: 2 out of 3 developers have the problem but on last machine everything is fine.
Restarting Jira / Server didn't help. Also I couldn't find an similar issue in the web.
Thanks for your help.
Here are some screenshots (black parts are added from my side):

