ChangeLog note at WordPress.org says about some compatibility with WordPress 2.9.1 fix. What was incompatible with WordPress 2.9.1? What was changed in this plugin version really? Do you need to make upgrade for this version? Interested? Proceed reading.
As you know WPMU lets to have multiple blogs under single WordPress installation. Blog list is stored in the
wp_blogsdatabase table. We will use blog ID attribute (blog_id field value) from this table. WPMU stores every blog data in the separate database tables set. Every blog data set differs with its blog ID in the name of the database tables, e.g. blog with ID=1 has
wp_1_optionstable, blog with ID=2 has
wp_2_optionstable, etc. So, to get the blog id=1 user roles capabilities from the database we can use this SQL query
Plugin Name:IP Logger v.2.8
Date of review: 24th January 2010
Author profile: M. Retzlaff
WordPress plugin directory link: IP Logger
“IP Logger” WordPress plugin tracks records about every visitor of your site in the separate MySQL table in your WordPress blog database. Visitor’s information has a lot of data including IP-address, user agent, country code, country name, city, etc… Convenient graphical visual presentation for that data is available via admin dashboard widget. Data can be exported into CSV or XML format. Plugin offers undesirable visitors blocking feature also.
From January, 4th, 2010 WordPress 2.9.1 is available for download. The most of issues updated in this WordPress version are shown already in the “WordPress 2.9.1. incoming” article. You can find the full list of files updated in the 2.9.1 version comparing to version 2.9 in this article.
You need to update your current WordPress installation to the latest one as soon as possible. Make it the solid rool for any new WordPress release. No matter if you did not see any bugs which this update fixes. It is for security reason primarily.