Len

Hi Japancinema,

It doesn’t look like you’ve changed your domain name settings to point at your new host’s nameservers.

Yeah, I’ve seen this with IE before. How exactly are you manifesting your 404? Do you actually have a 404.php file or are you using an else statement to display an error message in whatever template file is used to display a given post?

What I would do is don’t bother with the else statement, just place the following at the very top of your theme’s 404.php file (if you don’t have one create it)

<?php ob_start(); ?>
<?php header("HTTP/1.1 404 Not Found"); ?>
<?php header("Status: 404 Not Found"); ?>

I’m not 100% certain but it’s a good place to begin.

Call to undefined function... is almost always caused by missing or corrupt files. A shot in the dark, have you recently used the automatic upgrade feature to upgrade to 2.9? I ask this because I have heard a few problems related to it resulting in this particular error message. (calling is_admin in /wp-includes/var.php L16)

First, undo whatever it is you did. Then try a manual upgrade.
http://codex.wordpress.org/Upgrading_WordPress_Extended

It appears as though your site has been compromised. Have a look at the following links.

1. Several forum threads dealing with hacks
2. Codex info on how to harden your site
3. Detailed info on hacks from WordPress dev Donncha

Login via FTP and rename or delete the plugin.

I don’t understand the question? You want to display different content in the sidebar for different pages?

created a Category called Sidebar… but it automatically places any post under this category on all pages with sidebars.

That’s what confuses me.^^^

One way is to create Page Templates and new sidebar PHP files and use file includes to call those sidebars. For instance, lets say you have a page called “Contact” and want to include specific info in the sidebar on that page.

Create a new Page Template called “contact” (you can use your theme’s page.php file to guide you) and insert the following at the top…

<?php
/*
Template Name: Contact
*/
?>

Then when you create the contact page you can select the contact page template from the drop down menu.

Next, create a new sidebar.php file – call it whatever you want but for sake of simplicity lets call it contact-sidebar.php. Again, use your theme’s sidebar.php file to guide you.

In your newly created Contact Page Template use a file include like this…

<?php include (TEMPLATEPATH . '/contact-sidebar.php'); ?>

More reading:
http://codex.wordpress.org/Pages
http://codex.wordpress.org/Pages#Page_Templates

Your site has been compromised. You’re also using a vulnerable version of WordPress.
<meta name="generator" content="WordPress 2.6.5" />

Some good info in this thread…

http://wordpress.org/support/topic/268083?replies=5#post-1065779