Re: position on changing defaults?

[Juanma Barranquero]

>  There are a few random interface tweaks that might be done to ibuffer,
>  e.g. using a header-line for the column headings, but I suspect they're
>  almost trivial.

ibuffer already uses the header line to show the active filters; try

  M-x ibuffer <RET> / m <RET>

(though I agree it would make more sense to use it for column headings).

             Juanma