What should you avoid in inkscape to have neat illustrator imports of the svg:

  • Text using transparency. Use path->Object To Path on such text if really needed.
  • Gradients using transparency. If it is applied ont top of an uniform surface, its easy to flatten, compute the right colors with the pick color tool.
  • Images in inkscape are translated in two objects in illustrator: the image itself, which appears scaled down, and an invisble rectangle with the correct size. Resize the image to fit the invisible rectangle.

I am sure i'll find more and will udate this list to track possible solutions ...