An annoying issue is that on some clients, IE11 is displaying multiple lines for the toolbar buttons:
A work-around is to set the compatibility settings of IE11, more info on that here:
It seems to be fixed in the SP1 CU8 update:
We are happy to inform that the problem was fixed in CU8 for SQL Server 2012 Sp1.
Please visit the http://support.microsoft.com/kb/2917531 to get the update.
SQL Server, Microsoft