I’ve been using i3Theme with BuddyPress (http://www.mangoorange.com/resources/i3theme/) and there is a formatting error where the left or right sidebar (it’s 3 column theme) can appear 25px too low. This happens when the ‘who’s online widget’ is displayed and the problem shows in Firefox but not IE.
Looking at bp-core-widgets.php there is the line <div class=”clear” style=”margin-bottom: 25px”></div> in the function bp_core_widget_whos_online
Why is that line there? Removing it seems to fix the formatting problem…