I'm a beginner and I'm using Inkscape to design fabric for printing on Spoonflower.  When I upload my design as a png Spoonflower tiles or repeats my design. All of the designs I upload show a mysterious line along the edges of the repeats. How do I make this repeat flaw disappear?

Can you post an example of something you are happy to post publicly, including the SVG  ? 

Ive attached the svg of my design. I've also attached a png of the same design as it appears on Spoonflower (once they have tiled it).  Spoonflower prefers png.

I don't understand why, but a jpg saved at 99% quality works fine, but the png does not.

This seems to be something the Spoonflower site does. I've attached the jpg at 150pi. 

Great!  I tried uploading the jpg and it worked.  But how did you save it as a jpg? I don't see it listed as an option under "Save as"

I had another look at the original SVG and PNG with Spoonflower.

It seems that just putting a white rectangle behind the image in Inkscape fixes the problem.

Exporting to png and uploading to Spoonflower works fine.

Try this SVG.

Thanks.  I'll give it a try. Soooo much to learn!  ;)