I get the feeling when they do quality checks on these disc, they just pick a few random points in the disc and check those, rather than watching the entire thing. The spots they checked obviously weren't when the subtitles were on the screen. (Although any QA department worth its weight would have known to check those parts of the disc.)
If you happen to have worked on the Spinal Tap disc, and want to explain yourself, please feel free.
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Taxi
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