Well, nothing has been changed for the subrocs in quite some time (speaking in terms of Mod versions)... and that's definately a new one!
My guess is something screwy going on in that particular situation, as generally the 27ASW's work the way they should.
BTW, was this in SP or MP? Missiles in MP on client computers appear sometimes to do all manner of strange things, but on the host computer (and thus in the "actual" game) they are actually performing correctly.
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LW

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