This is [url]http://websvn.kde.org/?view=revision&revision=406411%5B/url] a personal commit by Aaron Seigo after which the buttons on the taskbar in KDE 3.4 ceased to be visually pushed, when using the Classic mode.
The key line in file kicker/taskbar/taskcontainer.cpp before:
style().drawPrimitive(QStyle::PE_HeaderSection, p, QRect(0, 0, width(), height()), colors, sunken ? QStyle::Style_Down : QStyle::Style_Raised); after:
style().drawPrimitive(QStyle::PE_HeaderSection, p, QRect(0, 0, width(), height()), colors)
After reverting this change and restoring the removed parameter to the function the taskbar works well again.
The fixed packages will be available in KDE:KDE3 repository as soon as the repo rebuilds.