I can reproduce this bug, for example in Kate (KDE 4.10.2 - Kubuntu 13.04 64 bits)
This is the report by Jorge in KDE: https://bugs.kde.org/show_bug.cgi?id=318151 ** Bug watch added: KDE Bug Tracking System #318151 https://bugs.kde.org/show_bug.cgi?id=318151 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1167455 Title: Dead keys stop working fine in KDE apps after navigating through menu bar To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kde-workspace/+bug/1167455/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs