****** The advice below has been updated. Please refer to the updated advice ******
The issue of equations not displaying properly in some browsers was resolved by Blackboard on 6 October. We have recently received reports that a small number of users have continued to experience issues with equations they have previously viewed in their browsers. As mentioned in our previous blog post, if an equation is not displaying properly for you, please clear your browser cache and cookies (using, for example, these instructions), then reload the page. This only needs to be done once on the device and browser being used, and can be done at any time (for example, in advance of taking a test which includes equations), after which the issue should not persist or recur.