30 May Sitewide Tags for WP 3.1.3
Some of the security changes in WP 3.1.3 causes Sitewide Tags to create a new post in the tags blog every time the post is updated after it's been published. I've updated the development version. The development version should work correctly for WP 3.0 through 3.1.3.
If you are currently using Sitewide Tags, please give the dev version a spin and let me know in the comments if it works.