The code coverage indicators are missing in some files in VS 2013 Preview 1:
http://screencast.com/t/L2QAj6Fq7Zh
Any idea what could be the issue?
Update:
After closing all files in VS it started working again.
However, when closing VS and re-opening it, it seems as if the files that are automatically being opened are again missing the coverage indicators.
Does that help?