Oh. Well that's a Microsoft problem, really. Most free software has been using the correct abbreviation for base 2 (KiB not KB) for some time now. Further, the annoying habit of using base 10 for line speeds and disk space is finally dying. For example, if Deluge tells me that I'm downloading a 4 GiB file at 4 MiB/s, I know it will finish in 1024 seconds and take up 4 GiB either on disk or in memory.