I am having a display problem using the Addthis module http://drupal.org/project/addthis with this Hiroshige theme. But only in IE (tested 7 & 8) and if you change theme to Garland it works fine. Firefox (tested 3.5) works fine.

To be specific, when you rollover on the share icon, a pop-up occurs but it is totally unformatted, has no white background, has no little logos next to the words (the words still link), the text is in the same font as the rest of the site, and the lightbox for "more..." totally fails to load on the screen (it fills the entire page with unformatted links).

Have you seen this before? Can you offer any pointers to look for in the theme's CSS/tpl.php files for what might be responsible for this in IE?

Many thanks.
-- glen
(X-post to #534886: IE error on Addthis project page)