Comparing a couple of binary files using the fast compare and browsing down using "next diff" until you go past the last difference, or even simply clicking "last diff", the diff indicator goes to the start of the files and then stops there.
First of all: in my case there are no differences there.
Second: why going back to the beginning of the file after having already scrolled down and continuing going forward?
It looks a lot like an index overflow of one element...