The team rebuilding Bristo Square closed a section of footpath on Lothian Street a week or two ago, telling pedestrians to cross the road and go round by the underpass. Presumably everyone ignored that silliness and walked on the road, so now the cycle lane has been fenced off as a makeshift pavement. Also, the fencing runs out a few metres before the pedestrian crossing traffic lights, so crowds of people are walking on the cycle path for those few metres. (The University has made its central campus area a hive of corporate festival activity so there are a lot of people about.)
Here's a map.