That is actually not exactly what i meant....
usually, when i doubleclick on the zoom icon it sets the the zoom to around 75% so that web documents are shown at actual size.
This is working perfectly in CS6 and WAS working in CC as well.... until today....
i literally just opened a document I was working on yesterday when it was still working perfectly. but now, when i doubleclick it always sets the zoom to 100%...