Manually set folder properties not retained!?

[kdepim-ml at graumannschaft.org]

My new kontact install on arch presents with the peculiarity that folder 
properties manually set (like "don't akt on new mail in this folder", "keep 
replies in this folder", custom retreival intervals, etc.) are setable via 
right click --> folder properties, but are not retained, meaning that if I 
revisit the properties, they are as they were before I tried to change them.

What could be at the basis of this and/ or how would I trouble shoot or 
remedy?

Thanks. Joh