I'm seeing some interesting (but not desired) aliasing behavior on Ink Pen strokes with some of the presets for the tool that seem to vary based on the rotation in the settings. Take the Billboard preset, for example. In the attached image, notice that with 0% rotation, the mostly horizontal stroke shows significant aliasing, while the mostly vertical stroke with the same rotation is very smooth. Increasing the rotation to 50% switches the aliasing to the mostly vertical stroke, while the mostly horizontal one is smooth.
I'm not sure how visible the effect is on the attached screenshot which I took from a low-res painting, but the aliasing is pretty evident in the application.
I hope that this is something that can easily be corrected.