i would say it is more your drives (possibly burner) than anything else as i have not had 1 issue that you speak of using a sh-d162c w/ kreon .081, xbc 2.5 @ 12x and a pioneer 111d @ 4x on verbatim dvd+r dl using the dangerous brothers 1.29 region free firmware. i can say that halo3 gives me no issues, but i haven't bought cod4 yet so i can't talk about that one.
the reason i bring up the region free firmware is that for some reason, the quality of the burns are much better when using the dangerous brothers firmware vs regular pioneer. when testing a backup on a benq dvd-rw (one of the best in terms of getting a good scan on a pc) the regular pioneer firmware would give me a quality of 0%, where the dangerous brothers would give me a quality of 94%+, in comparison, store bought pressed movies would give me a quality of 95-97%, so my backups are about as good as they can get. and i have done quality tests burning at different speeds, and 4x is the sweet spot - better than any other (IMG:
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before i switched the burner firmware, my backup would hiccup a little on rb6:v but my original would not. after upgrading to the dangerous brothers firmware, the backup was identical to the original - no hiccups at all (IMG:
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hope this helps.