Sexy Bookmarks stopped displaying the list of bookmarking icons in the post page. The problem occurs after updating it to version 3.2 today. To make the icons displaying again you have to visit the Sexybookmarks settings page under Dashboard -> Settings.
If you face the similar issue in your blog, then uncheck all the selected icons in the settings page and reselect the icons that you wish to add it in the list. This will solve the problem. We can expect the fix in next release soon.