Frontpage Problem when Upgrading Joomla to 1.0.15

When I was upgrading joomla version from 1.0.10 to 1.0.15, I found this problem with frontpage.

All of my read more...button that should link to the article page, But it showed the article with all the module positions appear like a frontpage. What happened?? If you look to the URL from the picture below, you will see that the url show Itemid=1.

To fixed this problem, just go to Admin page=>Grobal Configuration=>Content=>Itemid Compatibility Mode=>Choose Joomla! 1.0.11 and before then click save button.

This problem solved!

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Webmaster of Thai Othello Page