Hello everyone,

Here is my first contribution to Github, thank you all for sharing those wonderful works.

Today I used dask isin like df[df.x.isin(y)].compute() but y was not a list but a pandas series. The result is not an error, but a partial result (not all rows), so it's very confusing.

dask version 0.7.6 pandas version 17.1 with winpython 3.5.1.2

Best regards