Update: This problem is now fixed. Any new blog posts made going forward will work with Internet Explorer. Some blog posts made between August 18th and September 10th may still have this issue. Republishing your blog will solve the issue.
Some blogs are currently experiencing an issue that is preventing people from leaving comments with Internet Explorer. The problem does not affect other browsers such as Firefox, Chrome, or Safari. We are working on a fix and hope to have the situation resolved soon.