Give it a unique DIV ID and copy the same CSS from WP & obviously change the DIV ID name to what you have changed.
From phpMyAdmin, select bbPress tables and delete them by “drop” option. Before doing anything, takes a backup incase anything goes wrong.
Empty the database and then try to re-install it.
@johnhiler
Yes, I have gone through it.
Waiting for more suggestions!
May be you are out of track and I guess its a new forum setup. How about deleting the database and all the files and do it again. Make sure you do empty the database and recreate the sub-folder forum.
But my both passwords are different.
your footer DIV & one more DIV is out of the wrapper DIV. u knw it, right?
And before banging your head with CSS issues make sure the document validates. Currently it has 24 errors.
I got it!
One more question – We can login through WordPress.org accounts too. I once checked that I can and was wondering its implementation and the thing that if I am logged into the same account or there are two accounts for myself?
Did the installation went smooth or any issues were there? I would recommend checking the database if it really contains the tables created and then the bb-config.php file to check if its filled with required data.
If changes made by you are not reflecting in CSS, then there is something which is over riding it. You need to catch that.
Like the priority order in Inline, Internal and then External.
Read more here – http://www.plus2net.com/html_tutorial/css-types.php
Hope that helps 
@maramac
Did you read my reply over bbshowase? Thats the way it can be solved. To help you in your aim, install Firebug on Firefox. Run it using F12 and then you can catch the DIV you want.
Hope that helps
Place the navigation DIV code just after the
<div id="header">
.......................
</div>
and before the
<div id="main">
<?php if ( is_bb_profile() ) profile_menu(); ?>
Please don’t use Capital letters. Its considered as shouting.
Glad that you did it. 
@Jason
The issue is that I don’t know where to add those. Read this post.
As soon as I add the include line like
locations /forums/
{
include ...
}
even my WP stops working.
Are you on v1.0 now? If yes you are out of luck as most of the plugins won’t work with the newer version due to a lot of code which has been changed in bbPress.
P.S. – You can email me at ashishsainiashfame@gmail.com
<div id="blah">
<div class="box">
Content
</div>
<div class="box">
Content
</div>
<div class="box">
Content
</div>
</div>
These are containers to hold data. A bigger container can have a smaller container
Page contents are divided in DVIs and then styling to these contents is applied through CSS.
Got it now?
You are calling an undefined function. A quick search reveals that the function is of bbPress Polls Plugin. Make sure the plugin is installed & activated.
Now that DIV you need to find out yourself.
Install Firebug (Firefox Add-on).
Open your forum and press F12.
Now find the respective DIV.
You are new to CSS. So go by Hit n Trial method
I got it! No issues. Well, Can you recommend what approach should I have to grasp all the code of bbPress as there is no Codex at the moment. I remember you stating earlier that you learnt by studying others’ plugins. Any suggestions in this regard would be of great help. Thanks
Add that in style sheet. I use Notepad++ for all my coding needs.
You need to check out where you want the background i.e. the background of which DIV and then you can add this into style sheet :
#DIV_WHERE_YOU_WANT_BG {
background-image:url('img.gif');
}
and the path to the image is relative to the file. make sure it is correct too.
@maramac
I posted another reply there. Check that out too.
in header.php where the body tag starts.
After this
<body id="<?php bb_location(); ?>">
<div id="wrapper">
<div id="header" role="banner">
