Today I updated wp to 3.8 and also the graphene theme to version 1.92. Everything works and looks like before except the search button. The search function works correct. But now the search button icon looks like a blue rectangle. This happens only in the Internet Explorer Browser. In all other browers e.g. Firefox the icon shows his correct magnifiying glass symbol.
my hompage is: http://www.vintage-corvette.com
Hopefully some can help me with this issue/problem? Thanks in advance!