We have just released an update to StyleCop 4.3 which contains a number of bugfixes as well as a small number of new features. In particular:
Bugfixes:
Please upgrade to the new version, especially if you are hit by the crash in web projects.
Install link: https://code.msdn.microsoft.com/Release/ProjectReleases.aspx?ProjectName=sourceanalysis&ReleaseId=1425
Discussions: http://code.msdn.microsoft.com/sourceanalysis/Thread/List.aspx
Bugs: http://code.msdn.microsoft.com/sourceanalysis/WorkItem/List.aspx