I also want to know what version of Cura you have.
Assuming you are using an Ultimaker then you probably have a .4mm nozzle so you need to change the wall to .8 (not .9). Using .9 with nozzle set to .4 will cause problems (like the loops or "rings"). Wall should always be a multiple of actual nozzle size.
The stringing is mostly between support. There may be a bug regarding support in Cura where it relates to retraction - not sure.
There is a new secret beta version of Cura that has better support features. You can try it here:
http://software.ultimaker.com/Cura_closed_beta/
I'd like to see a better picture of the "rings under ears".
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illuminarti 18
What version of Cura are you using? I've seen several cases using recent versions where retraction doesn't trigger correctly when moving between islands over a print - that could be causing the stringing between the top most parts.
What sort of printer are you printing on? They seem to be rather non-ultimaker settings - are you using something else?
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