This week I have needed to view a group message on the service regarding an upcoming event. I was hoping for a quick hop on to view the details and then log off again. What I was confronted with was a broken and unusable mess. Attempting to click to view a message greyed out my screen and did nothing. Ok, I am a Linux user using Firefox and the OpenJDK Java runtime, maybe it's my system which is the problem. Windows 7 with Internet Explorer 32&64bit with the official Java runtime and Firefox still presented me with the same problems.
I gave up in the end and had somebody else send me what I needed.
In future if anybody needs to communicate event details to me please just email it.