What a silly situation this is. Here’s the fix for konqueror after you update KDE:
emerge -Davu kde-base/dolphin
Also had trouble with ogg, had to do this:
emerge -av media-libs/libogg
emerge -Davu dev-util/lafilefixer
lafilefixer --justfixit
…which did some scary stuff with my lib symlink files.
Life goes on. At least Firefox 3.5 is coming through now without a fuss.