The following icons need an alt text tags:

images/icons/browse_space.gif
images/icons/web_16.gif
images/icons/star_grey.gif
images/icons/add_12.gif
images/icons/feed_wizard.gif
images/icons/docs_16.gif
images/icons/home_16.gif
images/icons/add_page_faded_16.gif
images/border/spacer.gif
images/icons/subtract_12.gif
images/icons/attachments/file.gif
images/icons/blogentry_16.gif
images/icons/comment_16.gif
images/icons/mail_content_16.gif