Continuing with my irritation with journalistic flip-flops, I have noticed that the perfectly fine "soft-spoken" has been taken over by the rather tacky "softly spoken". From the FT: "Ruhl, a playwright, is a courteous, softly spoken American."
Another one: telecom vs telecoms. Everyone seemed perfectly happy using the former, and it was used an awful lot too thanks to a scam in India that scaled mammoth proportions. But now "telecoms" is in vogue and no-one knows why.
Can you think of other such inexplicable changes?