I don't think it's a goof. The Phoenix was only supposed to be capable of warp-factor one: the speed of light. The star-blur doesn't mean you're wooshing past those stars (which would be really bad astronomy!), but is an optical effect caused by the warp drive. Think how gravity warps light, e.g. Einstein rings.

That's what I figure, anyway. Don't know if that's Star Trek canon or not.

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