I returned to the balcony where the royal family was watching the wedding. I walked Graham to the end of the balcony, then clicked the "walk" icon on the doorway to the upper right of the screen. Graham walked toward the right side of the balcony, rumped up a foot in the air and became stuck. There seems to be a collision problem with the geometry of the balcony.
Could you possibly post a screenshot of exactly where that happened? I'd love to be able to replicate it.
Closing the thread and moving to Resolved Issues with a [NOT-FIXED] tag due to no contact in 24 hours.