Version: (using KDE 4.4.1) Installed from: openSUSE RPMs Sometimes when I update file associations from Konqueror, applying changes "Updating system configuration" doesn't end - it just keeps progressing to 95% (or so) and then starting from beginning. Cancelling it and running "kbuildsycoca4" manually updates the applied associations. BTW, I've experienced this for years, in KDE3 too.
This has been reported here: https://bugs.kde.org/show_bug.cgi?id=166792 I have the same problem though.
*** This bug has been marked as a duplicate of bug 166792 ***