Does it skip around the same time during playback?
what device were you playing the blu-ray on? and is this a new disk?
other than the generic have you tried cleaning the disk with a microfiber cloth (for fingerprints/dust/etc) or firmware updating?:
take a really good look at the shiny/read side of the disk.
I've had several rental blurays not play or skip over several parts on my ps3, mostly from almost imperceptible scratches. They play fine on my pc blu-ray drives (work fine on my LG UH08LS10 and my brothers Pioneer bdr-2206), sometimes with artifacts or such in the places the ps3 skipped.
I've read some standalone bluray players have this issue too.
It could be either a density based issue (doesn't help that data is stored 0.1mm from the read surface) or DRM. I recall having a bluray game with minor scratches (bought used) play fine on my ps3, so I'd guess DRM plays a big role.
http://en.wikipedia.org/wiki/File:Comparison_CD_DVD_HDDVD_BD.svg
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a thread from blu-ray forums
http://forum.blu-ray.com/showthread.php?t=77934
I'm not sure if that actually happens, but does the skipping occur for certain durations on the disks? the person of interest disks also happen to be 50gb disks so if it starts halfway through and continues to do so periodically, it might be related to the 2nd data layer, which probably wouldn't be visible.
Dual layer disks seem to be slightly more problematic than single layer disks in general
example image of layering in blurays
http://www.dailytech.com/article.aspx?newsid=1750
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also, some players apparently have problems with blu-ray live which can cause skipping (fixed by disabling blu-ray live).