I just found this in the man page for resize2fs, a Linux filesystem tool:
When “kilobytes” is used, I mean real, power-of-2 kilobytes, (i.e., 1024 bytes), which some politically correct folks insist should be the stupid-sounding “kibibytes”. The same holds true for megabytes, also sometimes known as “mebibytes”, or gigabytes, as the amazingly silly “gibibytes”. Makes you want to gibber, doesn’t it?
Ahh, geek humor. I love it.