Here is what is broken for me in the new build.
. Unit tests will not run. The app.config is somehow not read by the tests and I am getting an error that entries are missing.
. Unit test classes are not recognised by R#, and thus all the nifty test running icons in the left marging that I usually use to run the tests are not present. The test unit explorer do recognise them though as valid tests classes and when I run them, I get the app.config error mentioned previosuly.