The following KDE packages don't have a 3.5.2 ebuild, and in some cases don't have a 3.5.1 ebuild either. The current ebuilds have been modified to be aware of the new version of KDE ("MAXKDEVER=3.5.2"), but still use the old source distfiles. This is an unnecessary duplication as in most (if not all) cases, the new distfile will have been downloaded for the other updated packages. kdeaddons-kfile-plugins kdeadmin-kfile-plugins kdeartwork-emoticons kdeartwork-icewm-themes kdeartwork-sounds kdebugdialog kdesdk-kfile-plugins kdesdk-misc kdesu
Rev-bumping would only result in unnecessary recompiling (something the split ebuilds are designed to avoid), as the different versions of the packages are identical.
Yes, that's intended, not a bug. There's no newer version. http://www.gentoo.org/doc/en/kde-split-ebuilds.xml#doc_chap3