My love for a movie was way too much for the chat to handle and it apparently broke for some users running Internet Explorer.
The obvious issue is that it they are using Internet Explorer, but I thought It would be worthwhile to know regardless.
I have no idea why that breaks IE, so I'll happily pass that blame on to Redmond. But you shouldn't have been able to post that message in the first place (we missed a bit of validation). As you have learned in the meantime, that's already fixed.