Head over to Settings > Phone Updates to snag this update. Keep in mind that you must be a part of the Preview for Developers program to be able to obtain this update. This update seems to be relatively small, weighing in at less than 40MB. Could it be a fix to the BitLocker issue?
For those of you hoping this update fixes the 0x80188308 error, a Microsoft spokesperson had this to say: "As promised I want to make sure you folks are aware of what is going on. We have a new update coming out today, however this update will not fix this specific error message. We are still working on this as a priority to get it out to you in a as soon as we can. We will continue to update this thread as we have more information."
More on this as it develops. Did you get the update? Let us know details below.