[spaghetti]

Hi there folks.
I finally made up my mind on which fins to buy. Early this afternoon the courier has delivered my new pair of Omer Ice blades, old type with holes for screws, that I'll fit on my old Millennium footpockets.
I'll try them tomorrow in the poetic waters of Lerici.
Now the questions to Ice users.
Since some of you had their Ice broken, how did they get broken exactly?
Is it okay to dive normally among rocks with no fear of breaking them against rocks et cetera?
Did yours get broken in consequence of hitting something, or was it for structural reasons?
(should have asked before buying, but here it goes...)