What steps will reproduce the problem? 1. Run the JUnit test in attachment

What is the expected output? What do you see instead? Expected is the following exception : org.mockito.exceptions.verification.ArgumentsAreDifferent

Instead the following exception is thrown : java.lang.IllegalArgumentException: Something went really wrong. Arguments passed to ArrayEquals have to be an array or null!

What version of the product are you using? On what operating system? Mockito 1.4/Mockito 1.5 on Windows XP

Please provide any additional information below. See attachment.

Is it fixed in the upcoming 1.6 release?

Yes, it will be included in the next release, which should be pretty soon. If you need it right now you can get the latest version from trunk.