User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2b2) Gecko/20091108 Firefox/3.6b2 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2b2) Gecko/20091108 Firefox/3.6b2 When using any web-based email program powered by Zimbra, the up/down arrows next to the messages do not work. The scroll bar works if you drag it up and down, but the arrows do not work. Reproducible: Always Steps to Reproduce: 1. Sign into Comcast email. 2. Click up and down arrows to the right of messages to scroll through the messages. 3. Nothing will happen. Actual Results: I am unable to scroll through my inbox messages. Expected Results: The up/down arrow should scroll through all of the mail messages.