[Lynne]

When you hit the New Posts button, you are getting taken to the error page. For some reason though, the $headinclude isn't in there (check that your template isn't modified) and that is why you aren't getting any css.

Disable your plugins. Every place I go on your site I'm getting told I have to read some thread and the thread isnt' even linked in the message.
Note: To temporarily disable the plugin system, edit config.php and add this line right under <?php

PHP Code:

define('DISABLE_HOOKS', true); 


edit: Part of the problem on your site is this code:

<table border=0 cellspacing=0 cellpadding=0><tr> <TD Width=0 Height=0 valign=top>
<div id='citi_advertorials' style='position:absolute; left:3px; top:288px; width:623px; height:350px; z-index:1'>

</div>
 </TD>
</tr><tr><td><img src='http://static.manoramaonline.com/portal/images/trans.gif' height=5 border=0></td></tr></table>

I'm guessing it's the style positioning. If I get rid of the style in that code, the link shows and I'm able to click it and see the thread with no problem and click on the Community/Music/Movie/etc links with no problems.

Right under that code, you've got some invalid html also. You can't just write <table> then a bunch of stuff, and then </table>. There is a certain structure that a table requires. You should read up on it - http://www.w3schools.com/html/html_tables.asp It could be that some of the problems you are having on your site is due to invalid html causing problems.