I was printing at 100 microns, 50mm/s, 210 extruder temp, 65 buildplate temp, retraction enabled. Here's a picture of the exterior surface:
...and here's the interior of the same object:
What you can't really tell from the interior shot is that the bands of blobby parts repeat with great consistency and regularity. They run around the entire interior circumferance, and they occur at regular intervals, always at the top of the little oval features. The regularity of the artifacts is what makes me wonder if maybe Cura is paying less attention to the interior surfaces since it expects them to be hidden in the final part.
The design I printed is available here: http://www.thingiverse.com/thing:45315
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yellowshark 153
Well I am looking at a piece where the inside surface is as perfectly smooth as the outside surface. Using a Faberdashery filament run at 200 microns, 30mm/s, 210 extruder temp. I will admit that my piece is vertical whereas a vase has probably got an incline in the geometry, which could I suppose have an impact depending on the angle. But I have not experienced the problem you describe - I wonder if you arejust printing too fast. It would be helpful if you could post your settings, total width of outer shell to inner shell, how many walls you defined, plus a picture of the poor result.
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