Hello,
This is something that I have found as well, I have been on a fruitarian diet now for 43 days and on day 33 it started coming out and the last time I passed more was this morning, not every day though. but about a foot or two at a time for four times.
I have not taken any supplements or fiber for that matter so I have proved something for myself at least, there is nothing in the fruit diet that could have created or formed something this nasty in my gut! :)
rgds
Stef