I exchanged a 5-string warwick corvette for a 5-string streamer, standard (both were Korean-made). I wasn't unhappy with the quality of the vette, I just had a little buyer's remorse and since this is my first bass, decided I should spend a little less money on it, so I did. The new streamer arrived yesterday, and I immediately noticed a couple of things. First, the neck has a fairly pronounced forward bow. The odd thing about it is that it seems different depending on which side of the neck I look at. On the B side, it looks fairly uniform. On the G side, it looks like the bow stops and straightens out toward the higher registers, near approximately fret #17. The second thing I noticed was that the F# at fret #16 of the D string sounds absolutely horrible. It buzzes so much that it barely sounds a note at all. What's odd is that both the F and the G sound fine, and all other strings sound fine on frets #15-17. I took it to a tech by my house yesterday, and he agreed it didn't sound right. He said it could either be a problem with the string or a problem with the fret. He said generally if it is a fret problem, you will get the same sound on other strings of the same fret, which I don't have. The string doesn't look chinked though, and paying it bent produces the same buzz. Is it possible that the neck is twisted, or is it common for a bass neck to not bow uniformly due to different tensions on the different strings? I'm considering taking this one back and asking for a replacement. Any advice?