Just a quick note to those of you working with XCode 3.2.4 and trying to get any sort of unit testing working. There is a known bug/issue in XCode that causes unit test builds to crash. As it is written here (and here), “some part of the reporting code not respecting timezone issues. The output is tagged as ending before it began, so gets very confused and chokes.” The solution is to edit the Run Script step of the unit test target and make it look like this:
"${SYSTEM_DEVELOPER_DIR}/Tools/RunUnitTests" 1> /tmp/RunUnitTests.out
Works for me!

What y’all think about me…