Hi Dan,
Thanks for posting and I'm glad you've been enjoying NCrunch!
The problem you've described above is caused by Visual Studio failing to provide NCrunch with a pre-registered adornment layer. This is a problem that has been known to affect both NCrunch and other plugins seemingly at random, and as far as I'm aware no one has yet managed to reproduce in the issue in an environment equipped to properly discover its cause.
Essentially something has gone very wrong with your Visual Studio configuration/installation. Most likely the trigger is some combination of the plugins that you have installed, along with VS having some kind of issue while registering NCrunch during installation.
Things to try that may help resolve this problem (in order of desperation):
1. Try uninstalling NCrunch, then running '\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\devenv.exe /setup'. This will force Visual Studio to re-register its list of plugins and may solve whatever went wrong with the adornment registration. Afterwards, try reinstalling NCrunch to see if the problem still exists.
2. Try uninstalling ALL your Visual Studio plugins, then loading Visual Studio, opening a solution, and closing it down again. Then reinstall your plugins one by one (starting with NCrunch), after each install checking to see if the NCrunch markers are showing.
3. Reinstall Visual Studio (a last resort but near certain to solve the issue)
Cheers,
Remco