I've only come across ONE problem with my 1/60's and that's this:
A few weeks ago i was a bit annoyed with the reactive missiles so I was taking them off. When I got to the last one, the ring on the wing that holds the missiles in place snapped off.
Couldn't believe it, I hardly even touched it and it snapped right off! I didn't have any glue in the house, so I had to wait about a week to get enough money and got some super glue and fixed it. Course good thing I got that glue too cause the peg off my missile arm armor on my 1/48 VF-1S Hikaru snapped off outta the blue and had to reglue that!
But yeah, only issue I've come across on the 1/60's was that.