This plugin allows WordPress testers and administrators to display the revision and path of the Subversion working copy that their WordPress installs are running on. The information goes into a line in the admin footer. This line can be removed in favor of a tooltip if that is preferred (see installation instructions).
Upload the plugin file to your WordPress install and activate!
If you don’t want the line with the working copy path, you can opt for just the tooltip that appears when you mouse over the version number. To do this visit http://your.example-blog.com/wp-admin/options.php and change
the “show-svn-tooltip-only” option to “1”.