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有關問題網頁的實時瀏覽到這裏：http://rcnhca.org.uk/sites/first_steps/health-safety-and-security/HTML/CSS：IE8填充/背景位置問題
問題1：如果你去那個鏈接和翻滾的下拉菜單導航和它的孩子，你會注意到我在mouseenter上的每個li上生成了一個星形背景圖像的動畫。但是您滾動它在IE8它第一次從li，儘管我指定background-position: -25px 50%;中間動畫，奇怪的是，一旦jQuery的內聯應用相同的設置，它開始按預期運行。
問題2：正如你可以在下面的圖片中看到，IE8 （這正常工作在IE7）被錯誤地呈現我的填充。我已經重新使用* {margin: 0; padding: 0;}所有margin和padding在core.css：
的HTML標記這個導航條是：
<header class="one">
<nav class="container_16 clearfix" id="breadcrumbs">
<a href="http://rcnhca.org.uk/sites/first_steps" id="home"></a>
<ul id="parent">
<li>
<a href="http://rcnhca.org.uk/sites/first_steps/communication/">Communication</a>
<ul class="child">
<li><a href="http://rcnhca.org.uk/sites/first_steps/getting-started/">Getting started</a></li>
<li><a href="http://rcnhca.org.uk/sites/first_steps/health-safety-and-security/">Health, Safety and Security</a></li>
<li><a href="http://rcnhca.org.uk/sites/first_steps/personal-and-people-development/">Personal and people development </a></li>
<li><a href="http://rcnhca.org.uk/sites/first_steps/quality/">Quality</a></li>
<li><a href="http://rcnhca.org.uk/sites/first_steps/equality-diversity-and-rights/">Equality, diversity and rights </a></li>
<li><a href="http://rcnhca.org.uk/sites/first_steps/clinical-skills/">Clinical skills</a></li>
<li><a href="http://rcnhca.org.uk/sites/first_steps/additional-material/">Additional material</a></li>
</ul>
</li>
<li>
<a href="#">Select a topic</a>
<ul class="child">
<li><a href="http://rcnhca.org.uk/sites/first_steps/communication/why-communication-is-important/">Why communication is important</a></li>
<li><a href="http://rcnhca.org.uk/sites/first_steps/communication/communication-methods/">Communication methods</a></li>
<li><a href="http://rcnhca.org.uk/sites/first_steps/communication/written-communication/">Barriers to communication</a></li>
</ul>
</li>
</ul>
</nav>
</header>
和CSS來引導：
header {
width: 100%;
}
header.one {
height: 50px;
background: #44a9c4;
}
header.two {
height: 45px;
background: #3393b5;
}
/* =============================================================================
Breadcrumb navigation
========================================================================== */
#breadcrumbs {
padding: 0 3px 3px 0;
background: #ffffff;
border: 0px solid;
border-left: #3a90a7 2px solid;
border-right: #3a90a7 2px solid;
border-bottom: #3a90a7 2px solid;
-webkit-border-bottom-left-radius: 5px;
-webkit-border-bottom-right-radius: 5px;
-moz-border-radius-bottomleft: 5px;
-moz-border-radius-bottomright: 5px;
border-bottom-left-radius: 5px;
border-bottom-right-radius: 5px;
}
#breadcrumbs #home{
display: block;
height: 39px;
width: 55px;
float: left;
background-image: url(library/images/home_icon.png);
background-repeat: no-repeat;
background-position: center;
text-indent: -999em;
}
#breadcrumbs ul#parent {
height: 39px;
width: 905px;
float: right;
position: relative;
background: #f38630;
border: 0px solid;
-webkit-box-shadow: inset 0px -2px 0px 0px #cf7229;
-moz-box-shadow: inset 0px -2px 0px 0px #cf7229;
box-shadow: inset 0px -2px 0px 0px #cf7229;
-webkit-border-bottom-left-radius: 5px;
-webkit-border-bottom-right-radius: 5px;
-moz-border-radius-bottomleft: 5px;
-moz-border-radius-bottomright: 5px;
border-bottom-left-radius: 5px;
border-bottom-right-radius: 5px;
}
#breadcrumbs ul#parent li {
position: relative;
height: 39px;
float: left;
min-width: 1px; /* required to fix Opera bug */
padding: 0 47px 0 15px;
background-image: url(library/images/breadcrumb_seperator.png);
background-repeat: no-repeat;
background-position: right;
line-height: 39px;
}
#breadcrumbs ul#parent li a {
display: block;
height: 42px;
font-size: 0.938em;
font-weight:900;
letter-spacing: 0.01em;
color: #ffffff;
text-decoration: none;
text-shadow: 0px 2px 0px #cf7229;
}
#breadcrumbs ul li a:visited {
color: #ffffff;
}
#breadcrumbs ul#parent li:first-child ul {
left: -5px;
}
#breadcrumbs ul#parent li ul {
position: absolute;
z-index: 1;
left: -28px;
top: 42px;
background: #ffffff;
border-left: #3a90a7 2px solid;
border-right: #3a90a7 2px solid;
border-bottom: #3a90a7 2px solid;
-webkit-border-bottom-left-radius: 5px;
-webkit-border-bottom-right-radius: 5px;
-moz-border-radius-bottomleft: 5px;
-moz-border-radius-bottomright: 5px;
border-bottom-left-radius: 5px;
border-bottom-right-radius: 5px;
}
.js #breadcrumbs ul#parent li ul {
display:none;
}
.no-js #breadcrumbs ul#parent li ul {
left: -999em;
}
#breadcrumbs ul#parent li ul li {
float: none;
height: 26px;
margin: 0 3px 3px 3px;
padding: 0 15px;
background-image: url(library/images/star-icon.png);
background-position: -25px center;
background-repeat: no-repeat;
background-color: #738793;
border-radius: 5px;
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
line-height: 26px;
white-space: nowrap;
}
#breadcrumbs ul#parent li ul li a{
color: #ffffff;
text-decoration: none;
text-shadow: none;
letter-spacing: 0.01em;
font-weight: 100;
}
#breadcrumbs ul#parent li ul li:hover{
background-color: #3393b5;
}
.no-js #breadcrumbs ul#parent li ul li:hover{
background-position: 6px center;
text-indent: 10px;
}
#breadcrumbs ul#parent li:hover ul {
z-index: 2;
}
.no-js #breadcrumbs ul#parent li:hover ul {
left: -5px;
}
我花了很多年試圖調試這個問題，並且無法弄清楚爲什麼會發生這種情況，如果任何人都可以照亮t他很重要會很好。 （注意：我使用HTML5SHIV在傳統瀏覽器中呈現HTML5元素）