HELP (Fatal error)

I get this error when im using IE (8) browser to login in my elgg site..

<img class="river_avatar" src="
Fatal error: Call to a member function getIcon() on a non-object in /home/flixmi5/public_html/mod/riverdashboard/views/default/riverdashboard/miniprofile.php on line 37
when im using IE browser some of background images doesnt show.. and when I logged in it shows fatal error..
Anyone experience this in IE browser? Help me with this..
chrome and mozilla working properly except in IE..
this is the live site.