This is a known conflict with WassUp Topten/thickbox/Wordpress 3.X that will be resolved in the upcoming revision of WassUp.
If you need an immediate fix and you are comfortable editing plugin code, here is a plugin hack (for WassUp 188.8.131.52 only) to display WassUp topten stats in a new Window (or tab) instead of thickbox:
- Go to Plugins >> Editor,
- select "WassUp Real Time analytics",
- edit plugin file, "wassup/wassup.php"
- find line #1429:
else echo '" class="thickbox';
(about 1/3 down the page, between "hidden spam" and "main-tabs"/"Detailed list" sections),
- change code to this:
else echo '" target="_blank';
- click [Update File] button.
IMPORTANT: the position of single and double quotes in the changed code are exactly as shown. This is NOT a typo. If you enter them differently, Wassup will have a fatal error.
Also, never edit WassUp plugin code when your site is busy (check current visitors online). You should either deactivate WassUp manually or stop WassUp recording in Wassup-Options beforehand (and restart recording afterwards).