Blockbuster Blu-ray -- Question about Rentals

[BluDrew]

Hi all, long time lurker, first time poster! Here is my situation, I received two BD discs from BB, Apocalypto and Punisher. They load up fine, but Apocalypto skips about 1/3 the way through for a few seconds and then freezes. I can start at the next chapter but whenever I try to go back and watch the scene it freezes again. The same thing with Punisher, but closer to the end with about 30 minutes left. I looked at both of the discs and at first they looked perfectly fine, but looking a little closer there are a couple of very small scratches on the discs (maybe they were dropped???). First, would this be causing the freezing? Second, does the toothpaste trick work with BD?

Has anyone had this problem before? I've rented about 12 titles, and only these last two have given me problems.

Edit: I'm using the PS3, latest firmware.