General
* NUnit no longer stores settings in the test configuration file, as it did in earlier versions. Specifically, we no longer recognize or support OldStyleTestCases, ApartmentState, ThreadPriority or DefaultLogThreshold in the configuration file. Further details on each of these features are included in the appropriate sections below.
* The TestRunner interface has been modified. Applications using this interface will need to be modified but general users are not effected.
Framework
* User-defined equality comparers specified with the Using syntax element may now be used with arrays and dictionaries. Essentially, this means that there are no longer any restrictions on the Types for which a user-defined equality comparer may be specified.
* So-called "old-style" tes...