It has nothing to do with liking or not liking spaces per se, but simply that you should support the features that the operating system allows. Look I hate spaces (and non-ASCII characters for that matter) in files names as much as the next programmer who's ever had his code fail due to them, but if I'm writing for a platform that supports them, then I try my best to deal with them, and tread any failure in handling them as a bug that should be fixed.

Just a small correction. While nobody uses spaces in file names in Plan 9, and at least in Inferno #U changes spaces to something else, spaces are not forbidden in the kernel since March 23th, 1999: http://swtch.com/cgi-bin/plan9history.cgi?f=1999/0323/port/c...

I don't care about it - I'm saying the people who use operating systems (as opposed to the people who administer them) do.