graphics glitches in Dishonored?

When I'm playing Dishonored theres fairly often graphics hiccups with flashes of lost color and weird blips. Does anyone else have this problem? I don't have an issue with other games on my ps3 or movies so I don't think its my hardware. Is it just the game? I find that kinda hard to believe since I saw no mention of that issue on various reviews. Any suggestions to fix it? Thanks

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Apart from the occasional case of slow texture-loading when loading a save or entering a new area I didn't have any problems.