I am a teacher and brand, brand new to Inkscape. I want to use it with my class of 9&10 year olds to create a repeating tessellating geometric pattern. I am using the polygon tool to create a hexagon, snapping it to the grid and then copy and pasting it. When I try to butt the copied shape up to the original the boundary box corners are showing up white against the original shape.

I have used a tutorial video to do this and on theirs it didn't do it so I am wondering if there is anything I can do to get rid of it? I am running Inkscape on a Mac (Mavericks) via XQuartz.

Any help gratefully received as I am loving the program so far and really want my class to use it!

Feel free to upload the svg file, to check that it is ok.

You might also try the clone tool, to see if that works better. There are other fun aspects to the clone in this application. ( Use strokes, no fill and scale original after tessellating )

Just a guessing.
Any chance you run inkscape on mac?
http://www.inkscapeforum.com/viewtopic.php?f=5&t=16230

-On a side note, instead of copy/pasting, you may better use duplicating (Ctrl+D).-