LocaleBrowserDetectionTest->testLanguageFromBrowser() bugged?

There are some outstanding edge case issues between D6 Simpletest and testing using Locale. Related issues:

#348455: Provide a scalable way to ensure a clean testing environment for SimpleTest
#1419530: OG6 Language Tests Failing
#346844: Clear language statics to remove locale module errors

The unfortunately answer (buried in these issues) is that the way the testbots work, you may need to modify the test to make them run on the testbots (which are built on D6); while they seem to work fine on D7.

Perhaps we'll see an improvement after updating the testing infrastructure to D7. *shrugs*