JuliaPro - "Interact" broken?

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)

works on a stand-alone Julia 0.5.1 install (OSX, my laptop) but not under JuliaPro- (OSX, iMac). The version of Interact appears to be the same (0.4.3) in both cases.

Just tested on JuliaPro- (with Interact v0.4.5) and it does not work either. :frowning: