As pointed out in Phil Bacharach's review of It Came From Beneath The Sea, because a sort of 'seamless branching' technique has been used to be able to switch between the colour and b/w versions of the film, it seems DVD players interpret this as two different angles - and therefore the 'angle' icon is permenantly on during the movie.

Normally you would only ever see this icon on special features which allow you to watch scenes filmed from different angles.

And I mention this because I also had the same effect on my copy of Earth Vs Flying Saucers.

OK, I guess you could disable your on screen display from your dvd menu, but I just thought it was worth bringing it to peoples attention.