SmirtClient error message

[markgoldin]

I see this message in Mozilla error Console:
Warning: Unknown property 'filter'. Declaration dropped.
Source File: http://mark:81/beltrailway/common/isomorphic/skins/SmartClient/skin_styles.css
Line: 135

[Isomorphic]

You can safely ignore this warning - it's referring to a css attribute that is supported by Internet Explorer, but not Mozilla, and has no effect on appearance or functionality