If you are having a problem with the chatting feature in Blackboard, there is now a fix.
The problem was a java issue with a patch that we installed. We rolled back the patch to resolve the problem for new chat users, but any users that had used chat before in any capacity will need to clear their java cache for it to work properly.
Note: Java cache is different than browser cache! See below for instructions to clear the java cache.
Instructions for clearing Java cache: