Anchor tags which link to the part of its page placed inside of a box element with clearfix collapse top margin of the box element.

You need clear floated objects after the box element.

Anyone knows alternate way of clearfix?

# do not use "clear" on the frame which tagged floated elements, and use clear on the object after the frame.

FireFox ignores the size of Flash if it is set by percent. FireFox renders HTML strictly based on Doctype when Doctype is HTML 4.0, XHTML 1.0 or later version.

I had to code HTML with this type of Flash that other person made, and faced this problem. I didn't know this old issue.

The solution is adding size 100% for parent elements.

<style type="text/css">
<!--
html,body { height: 100%; width: 100%; }
-->
</style>

You also need add elements outside of Flash tags.

You can see a description about this issue on Adobe Developer Connection page.

http://www.adobe.com/cfusion/communityengine/index.cfm?event=showdetails&postId=3644&productId=1&loc=ja