MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
You're probably over-extruding a very small amount so the sockets are too tight. The author of this post is probably under-extruding :)
There's a REALLY great extrusion test print and calibration excel file you can use to plug in the measurements from the print and it calculates the perfect extrusion multiplier for your setup: https://www.thingiverse.com/thing:1622868