I've built a Gentoo Linux 2007.0 from stage1 on a PPC machine and discovered, that Konqueror lacks the Gentoo default path to Netscape plugins.
The way I built KDE/Konqueror:
emerge -v kde-base/kde-meta
Thereafter some Netscape compatible plugins:
emerge -v net-www/mplayerplug-in media-video/vlc net-www/swfdec-mozilla net-www/gnash app-text/djvu dev-java/ibm-jdk-bin
This path is missing:
I had to manually add it (on a user basis) to
Setting -> Konqueror -> Plugins -> Netscape plugins.
If there is a way to add /usr/lib/nsbrowser/plugins by default, it should be done in the ebuild(s).
I think that this bug is arch independet.
I use stable tree ACCEPT_KEYWORDS="ppc". I suppose it's the same with "x86 amd64": KDE 3.5.8.
A Gentoo user who installs (=builds) a fresh Gentoo system, and who doesn't do anything after all packages are merged, is left with a KDE whose Konqueror doesn't use the installed plugins.
That's what happened to me first. I installed some plugins (Java to begin with) and wondered, why Konqueror didn't use any of them.
If it is the Gentoo way to install Netscape compatible plugins into /usr/lib/nsbrowser/plugins it should also be automatically set to every Netscape-compatible browser by default.
*** This bug has been marked as a duplicate of bug 234326 ***