This is really probably because of Qt 4.6. KDE 4.3.x was never tested with Qt 4.6 as it was intended to be used with Qt 4.5 since 4.6 was in beta at the time. Things should resolve themselves once the KDE 4.4 betas hit Lucid. If not, please direct all KDE application crashes to bugs.kde.org. Thanks.
This is really probably because of Qt 4.6. KDE 4.3.x was never tested with Qt 4.6 as it was intended to be used with Qt 4.5 since 4.6 was in beta at the time. Things should resolve themselves once the KDE 4.4 betas hit Lucid. If not, please direct all KDE application crashes to bugs.kde.org. Thanks.