I'm confident that we can rule out accident, the viv this on is in doesn't have anything that could damage her.
Calcium could be a factor, she's only eaten salmon and has refused to eat anything since we started coating it with calcium power. We have calcium supplement in her water though, so as long as she is actually drinking (she doesn't appear dehydrated) she is getting some calcium from the water.

Steve - I have some video of her moving it's not great as the light wasn't good, I'll try to catch you on Skype later.