I've torn the forum apart hoping I could figure this out on my own, but I totally haven't. Woe.
I've got the following image:
http://dl.dropbox.com/u/33004925/LOGO-duo%20color.svgI'm trying to "punch out" the spaces inside the letters to make them transparent. If you look you'll see it's not text, and never was; I was actually tracing a bitmap image of an old logo I did not have in vector art format. The four "spaces" (closed paths) are all the same, as far as I can tell. Mind you, I've switched the "fill rule" back and forth so many times at this point I have no idea what's up.

So I figured, do the trace, combine, voila! Well, not so much with the voila. Three of the "spaces" are combined properly every time, the "space" inbetween the K and the B is just not. Ever. No matter what I do. I can't give a complete list of what I've tried as I've been banging on this problem for two hours and messed around with just about everything. I even re-drew the object, throwing the original version away, thinking some setting I could not find was wonky. But, no, like a bad penny that "space" (object) does not want to combine. Or, it does combine, it just doesn't punch out like the other three spaces do. I'm totally flummoxed. Oh, note that when I combine, I put the large "kbs" outline on top, so that the fill for the letters works properly after the combination. That part works great, except for the one object that isn't playing along.
I'm not an inkscape guru by any means, and I suspect this is a simple problem with a simple solution. I hope, anyway. Advice/ideas desperately needed!