It came to my mind to write an easy and short how-to to explain for not very techy people the way to upgrade their self-hosted WordPress, when one of my clients asked me why her admin interface was showing that she should upgrade WordPress to the latest version. She thought she had already done that. In fact she had, but to the version 2.5. Now it is a long time WordPress version 2.5.1 is available. Well, this can help my client to upgrade WordPress herself, but I would love also this this help hundreds of others. Enough with the words, let us begin.
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