Version: (using KDE 4.1.3) Installed from: SuSE RPMs provide access key L for all "log in" occurences It is a matter of u7y and a11y. Such page as: https://bugs.kde.org/wizard.cgi has "Log in" item yet the access key is V. And the L is assigned to "New account".
Going through the sources i can't find any occurence of an access key L or V being set. Most likely it was already solved along with some updates. However, such parts are usually a problem with the upstream project.