Internet Explorer versions 5.5 and 6.0 do not display transparent PNG files correctly. Instead of applying the image transparency, the browser displays transparent images in an ugly gray box. Tapestry includes a javascript-based fix for this bug. To enable the use of the IE PNG fix, simply select the IE PNG Fix checkbox from the theme configuration page.

Tapestry's IE PNG fix is implemented using Drupal's built-in jquery framework, so it should not interfere with any additionally installed modules. However if you do experience a problem (or if you just don't use PNG files on your site), try disabling the IE PNG fix.