Two column layout with header - RH column overlapping into Header area

I have used a DW Layout css - twoColFixLtHdr.css.
The first item in the right hand column div(maincontent) is div flattext. I have put a background colour on this which is overlapping the menu bar in the header div, in Firefox.
In IE it is ok.
www.brownsox.co.uk/Dummy/flat1.html 

I have tried everything I can think of and wasted two days on this problem.
Help would be so appreciated. (I need to know what to try and why it is happening)
Thanks
BigpollyAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

mr_egyptianCommented:
Try adding the following to #flattext:
float: right;
margin: 25px 0px 0px 0px;

Open in new window

0
Corrup7ioNCommented:
You haven't cleared the floats used for your navigation, therefore the floated content its floating with the navigation. I would recommend changing


<div id="sidebar1">...</div>
<div id="mainContent">...</div>

to something along the lines of

<div id="content" style="clear:both;">
  <div id="sidebar1">...</div>
  <div id="mainContent">...</div>
</div>

Open in new window

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
BigpollyAuthor Commented:
Miraculous!
I have wasted so much time with this and in the end it was so simple. I can't thank you enough!
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Adobe Dreamweaver

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.