small du(1) question

[Alexander Best]

hi there,

the du(1) man page states the following:

"
     -B blocksize
             Calculate block counts in blocksize byte blocks.  This is differ-
             ent from the -k, -m options or setting BLOCKSIZE and gives an
             estimate of how much space the examined file hierarchy would
             require on a filesystem with the given blocksize.  Unless in -A
             mode, blocksize is rounded up to the next multiple of 512.
"

is this a doc bug, or does du(1) really always assume that every filesystem's
blocksize == 512?

cheers.
alex