UPDATE: The server has been successfully patched as of 8:00 PM (12/29/11), and there should have been minimal impact on accessing or using D2L.
Learn@UW has been notified of a Microsoft security advisory and will be applying a patch to their database systems sometime in the next 24 hours, most likely either later in the evening or early tomorrow morning to minimize the effect on active courses.
While the patch is being applied, there may be some erratic behavior, which should be resolved by refreshing your browser. We will be updating this news item when the patching has been completed. We apologize for the short notice and thank you for your understanding as the situation requires immediate attention.