Make sure that you configure your browser settings properly when accessing any sites with hosted apps/desktops, based on the Sharepoint 2013 browser general guidance.
- Internet Explorer: Follow instructions at http://technet.microsoft.com/en-us/library/cc263202.aspx#configurebrowser
- Other browser: For information about supported browsers, see http://technet.microsoft.com/en-us/library/cc263526.aspx
