Hi C,

I'm not sure from your description exactly what the order of events was, beyond trying to edit an SVG after it had already been loaded into a part in Fritzing.  So I will give you some general information and hope it speaks to your issue.  

When you load an SVG into the parts editor, fritzing makes a local copy of it, and adds a bunch of numbers to the filename to ensure the uniqueness of the filename.  Furthermore, the Fritzing part definition file (.fzp) now expects to find (load) that renamed local copy (not the original SVG).  

Once that local copy has been made, you can basically no longer edit it with Inkscape (or Illustrator).   Inkscape (and Illustrator) and Fritzing all have different ways they treat SVG files, and when Fritzing first loads an image created by Inkscape (or Illustrator), Fritzing has to "clean" it, and then Fritzing adds its own metadata.  Putting the local copy back through Inkscape (or Illustrator) and trying to reuse it in Fritzing is not likely to work.  You might get lucky with Inkscape, especially if you use the "save as plain svg" option (that option can be found only if you use "save as"), but this is not guaranteed.  

So your best bet is to make sure you're done editing your SVG before you load it into Fritzing, or if you need to change it, edit the original SVG file (not the local copy), then in Fritzing open up your part in the parts editor and reload your edited SVG into the part.  When you do that, the file dialog presented by the parts editor will default to the location of the local copy (which is either a bug or a feature), so you have to navigate your way back to the original SVG file.  Unfortunately, when you reload the original SVG, you will lose any connector information that you previously added.

Hope this helps.

As to the 3-lines-of-text problem.  You can try sending the file to info (at) fritzing (dot) org and we will try to figure out what's going on.

- j