I opened PCBViewGraphic_Template.svg from http://fritzing.org/learning/tutorials/creating-custom-parts/download-fonts-and-templates -> http://fritzing.org/media/uploads/learning/graphic_standards/fontsandtemplates.zip
with Inkscpae and measure a pin spacing of about 2.03mm, not 2.54mm or 0.1".
I thought it was supposed to be 0.1" / 2.54mm to fit breadboards…or is that wrong? Can someone else confirm that the pin spacing in PCBViewGraphic_Template.svg is ~2.03 like I measured?