Currently we allow the following HTML tags in comments: Single tags These tags can be used alone and don't need an ending tag. <br> Defines a single line break <hr> Defines a horizontal line Matching tags These require an ending tag - e.g. <i>italic text</i> <a> Defines an anchor <b> Defines bold text <big> Defines big text <blockquote> Defines a long quotation <caption> Defines a table caption <c