Any actions in the UI that generate a "modal dialog" (ie edit settings, create a snapshot) take a long time to open (~2 min). Other actions that to not generate a dialog respond quickly. This happens across Chrome and IE, on multiple computers, for multiple users, and has been a problem on multiple versions of the fling (at least since April?).
A couple of times immediately after upgrading to a new fling version the problem has gone away, but then it reappeared within a few days. Restarting the services nor rebooting the appliance resolve the issue. Clearing all browser data (cookies, cache, content settings, & hosted app data) does not fix the problem either.
Chrome's network trace shows a 2 minute wait on time to first byte on the XHR request when I click to generate the dialog box.
I do not have this problem on the HTML5 client that ships in our VC appliance (version 184.108.40.20600). Our current fling version is 220.127.116.1192689.