Print Issue - XY aligment problem

Hi guys,
currently i'm struggling with a XY misaligment of some sort.
The following is the picture of my last print:



As you can see, the arcs do not overlap perfectely along the Y axis, however everything seems to be ok along the X axis.
At first, I've thought it was a bad calibration on one of the axes, but then I realized that if so, it should have printed ellipses instead of circles...
not the weird print I've got.
Anyone who has had this issue before?

Thanks ;-))

I would suspect some sort of looseness on one of the axes. Make sure your belts are tight and there is no play in either the X or Y carriage.