There is ONE way I can think of that they aren't (or weren't last I checked), though. I seem to remember that if narrations are too long, you'll see the whole thing in your preview, but after you save the strip, the narrations can be mysteriously truncated if they're too long.
I think Brad may have fixed that one ...
Though I did find a case where preview would have helped. I was recently doing a comic that included some leet-speek in which some back-slashes were essential. It previewed fine, but in the posted version, the back-slashes didn't show (I'm not sure if the characters following each one were also lost). Since there was no other way to do what I was doing (a tribute to Al Hershfeld with a bunch of embedded "Ninas"), that comic got deleted and never rebuilt.
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ken.kaufman@gmail.com