For the lightstorm photography:
There is a syntax error after you specify the mouseover event for the "home" button that may disrupt the other hover links on certain browsers that are not forgiving. there is an extra "/" just before the
Code:
<img id="Home" src="images/Home.gif" alt="" name="Home" width="27" height="26" border="0" /</a>
remove it.
In general though there differences in how different browsers render a certain page. Main differences are in javascript events and css attribute handling. Always check with all the browsers after major css or javascript additions to check for incompatibly. Thus you will be able to spot the innocent attribute/function easier.