If you're 100% sure that she dropped it on purpose, absolutely file a complaint against the driver, Jon.
I've heard quite a few first-hand stories from others in my profession that have lost expensive equipment due to careless handling and yet end up fighting to get the insurance compensation that they paid for.
I assume that in this case, SVS paid for and handled the shipping and therefore would be compensated, but a pro-active stance from your point of view wouldn't hurt.
Besides, what if it had been irreplaceable heirlooms? She shouldn't be on the job with an attitude such as she displayed, and these days it can be damn difficult to fire someone (no matter how incompetent) without lots of documentation.
