Thanks again for the tips. I checked those .debs you cited and they are indeed installed. I think the trouble is that pcmanfm 0.9.7 is buggy, and 0.9.10 in squeeze won't install (is squeeze armel incompatible with "easy debian"?).

That "operation not supported" error appears to be endemic to 0.9.* (though samba success is cited with 0.9.10). Samba's there, pcmanfm just won't play nice (I think it's a libfm problem).

Jake