I was watching Obi-Wan fight Grievous in this clip and happened to pause right after he cuts off Grievous's second hand as the saber falls away (the 2:36 mark):
Here's a couple screen grabs of what I noticed:
What the heck!? That looks identical to Kenobi's saber!
Given that Grievous never made his own and had a love for collecting the sabers of Jedi he'd killed, my question is who did the sabers used in this battle originally belong to (especially the Obi-Wan look alike I spotted)?