As part of my company separating from our parent company, we are migrating out of their JIRA (currently 6.4) to our own instance and are upgrading in the process to 7.x. We'll be coordinating QA activities soon and I haven't seen the new site on 7.x yet, so I don't know if there are any visual or style changes. In anticipation of users being confused because something looks different, I was wondering if anyone is aware of any major changes to the layout or functionality between these versions?