I'll post the screen shots when I can, but throughout the test I was being stalked by vendors and shrines.
Every so often, a vendor and shrine would appear. You can not interact with them except for the Info option. I noticed a variety of giants represented and a number of different vendors. Lem and Humbaba both paid a visit to my lounge.
I don't know when it started, but I first noticed it in my house. Then I started noticing it out on the streets, and it seemed to become more frequent as the test continued. The frequency was up from once every few hours to once every few streets. I put out a couple of bug reports.
A change of street fixes the problem, as does reloading. A total browser reload doesn't seem to stave off the increasing frequency.