Featured Image Help

Hi,

I would like to make the featured images all be color and not have a hover effect. I was able to do this for macs in the css but it's not working on PC. Any suggestions?

Also, I changed the size of the featured image to be more like a square, how do I get the full image in there without it cropping it randomly?

Any help would be greatly appreciated! If you need to see the site it is http://www.tootsiebellittera.com

Thanks.
Janine