我已经将png图像上传到网站上，在Firefox，Chrome和Safari中看起来完美，但在IE中看起来很糟糕。我从Photoshop中保存了这些文件，它们具有图像大小下的一个功能，可以让您选择以下选项之一作为图像: bicubic automatic、bicubic sharper、bicubic smoother、bicubic、bilinear和nearest neighbor。这些选项中的任何一个会有帮助吗？
<ul class="social">
<li><a target="_blank" href="https://plus.google.com/+ToadhallcottagesCoUk/posts"><img onmouseout=this.src='/images/googleplusgrey-flat.png' onmouseover=this.src='/images/googleplus-flat.png' src="/images/googleplusgrey-flat.png" width="38" height="38" alt="Toad Hall Cottages Google Plus Page"</a></li>
<li><a target="_blank" href="http://www.twitter.com/thcottages"><img onmouseout=this.src='/images/twittergrey-flat.png' onmouseover=this.src='/images/twitter-flat.png' src="/images/twittergrey-flat.png" width="38" height="38" alt="Toad Hall Cottages on Twitter" /></a></li>
<li><a target="_blank" href="http://www.facebook.com/holidaycottages"><img <img onmouseout=this.src='/images/facebookgrey-flat.png' onmouseover=this.src='/images/facebook-flat.png' src="/images/facebookgrey-flat.png" width="38" height="38" alt="Toad Hall Cottages Facebook page"/></a></li>
<li><a target="_blank" href="http://www.pinterest.com/thcottages/"><img <img onmouseout=this.src='/images/pinterestgrey-flat.png' onmouseover=this.src='/images/pinterest-flat.png' src="/images/pinterestgrey-flat.png" width="38" height="38" alt="Toad Hall Cottages Facebook page" /></a></li>
</ul>
CSS：
img.icon {
vertical-align: middle;
margin-right: 8px;
margin-left: 2px;
image-rendering:optimizeSpeed; /* Legal fallback */
image-rendering:-moz-crisp-edges; /* Firefox */
image-rendering:-o-crisp-edges; /* Opera */
image-rendering:-webkit-optimize-contrast; /* Safari */
}