<p>The build server shows that we must have made some change recently that causes the GaussianDistribution to evaluate the probability incorrectly on older versions of Armadillo:</p>

<p><a href="http://big.cc.gt.atl.ga.us/job/mlpack%20-%20nightly%20matrix%20build/">http://big.cc.gt.atl.ga.us/job/mlpack%20-%20nightly%20matrix%20build/</a></p>

<p>This should be pretty trivial to reproduce given that it happens on every build with Armadillo older than or equal to version 4.400.</p>

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