is flock broken in 2.4 or 2.5 kernels or what does this mean?

To save others a bit of searching:
the original thread was 'broken flock()' on 28 June 2002.

Steven's post and regression test:
http://marc.theaimsgroup.com/?l=linux-kernel&m=102562226210792&w=2
Matthew Wilcox's rip-it-out patch:
http://marc.theaimsgroup.com/?l=linux-fsdevel&m=102562469813922&w=2

See also
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=59992