If you site blocks Facebook access, you may notice that Mudbox will crash. This is because the Welcome Screen for it connects with the Mudbox Facebook Community.
In order to get past this problem, please rename the following Facebook connectivity plug-in from:
C:\Program Files\Autodesk\Mudbox 201x\plugins\MudLife.mp to Mudlife.mp.OLD
Thanks to the Development Team for alerting us of this issue.