I'm running python 2.7.5 with scikit_learn-0.14 on my Mac OSX Mountain Lion.
Everything I run a svmlight command however, I get the following warning:
DeprecationWarning: using a non-integer number instead of an integer will result in an error >in the future
As answered here, it's Numpy 1.8.0 deprecation warning caused by indexing with non-integer in scikit-learn. It won't affect the results.