FYI, it happens so often that they actually put it in their FAQ, but not into user manual. You are coming from that part of the world where userguides are saying you shouldnt dry your cat in microwave owen, right? If nothing else it should seem a bit suspicious to you...
A real FYI is people do things without thinking so often manufactures go nuts printing exhausting list of FAQ's to cover all the things that should be obvious.
If you read it it clearly indicates OVER TIGHTENING or tightening down a TO LONG atomizer pin can crush the o-ring.
Check VAMO forum - SAME issue
Check sigelei Z-Max forum - SAME issue
User Error
A fix, a realization and common sense makes for a permanent fix.
Please understand, I own (2) eVics. I work three 12hr shifts a week and the evics are in my hand most of the rest of the time. I constantly change clearos/tanks, Oops drop them, and have NO damage to either one in almost 7 months use.
eVic is definitely not the end all be all, but if you pay attention and use it properly, baring an internal issue, the thing is one hell of a nice device.