I decided to give KDE 3.2-beta1 a try (just for reference I'm using the Gentoo ebuild), and found a problem with compiling winearts
under KDE 3.1 "artsc-config --cflags" gives me -I/usr/kde/3.1/include/artsc
but under KDE 3.2-beta1 I get -I/usr/kde/3.2/include/artsc -pthread -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
which causes a problem because this value is passed to makedep during compilation, which fails with "Unknown option '-pthread'"