Dashboard error plus No update required error

Good day,

I have problem with my Dashboard. It has weird styling (fixed width) and the content is pushed down (it starts after the left menu bar). You can see the screenshot using this link
http://www.diigo.com/item/image/1uijm/h8b1
For the first few seconds, the dashboard loads normally (full width) until it tries to load “WordPress Development Blog” and “Plugins”. Then the unusual “No Update Required” error came up (red square in the image link above) and the Dashboard styling gets weird like I said before.

I can’t remember specifically when it happened but my guess is after I installed Yoast SEO and uninstall popularity-contest.

I’ve search the forum and found these two related post but it was posted a year ago http://ww.wp.xz.cn/support/topic/no-update-required and 4 months ago http://ww.wp.xz.cn/support/topic/no-update-required-your-wordpress-database-is-already-up-to-date

I do notice that there’s no notification for available updates anymore on the menu bar.

For information, I have the latest WordPress 3.2.1 running on shared hosting with MySQL 5.0.92-community and PHP 5.2.14. Currently I’m using twenty eleven theme. Other wordpress installations are not affected. my blog link http://blog.torboxz.com