Within a Jupyter notebook
using Interact, Gadfly, Distributions @manipulate for α in 1:100, β = 1:100 plot(x -> pdf(Beta(α, β), x), 0, 1) end
works on a stand-alone Julia 0.5.1 install (OSX, my laptop) but not under JuliaPro-0.5.1.1 (OSX, iMac). The version of Interact appears to be the same (0.4.3) in both cases.
Just tested on JuliaPro-0.5.2.1 (with Interact v0.4.5) and it does not work either.