I have that figure as well. Mine also is fine, she's constructed out of both PVC and ABS. Feel her hair for example, it doesn't flex like PVC would, it's much more rigid. IIRC her right leg (supporting leg) is also ABS, making her quite stable. Good Smile Company seems to be pretty on top of things when it comes to that.
Which is why I feel comfortable buying Canaan and Alphard.