Patch for KDE3.5.3 that implements a remember titlebar button. KWin already has window-specific settings (in Alt+F3/Advanced or Alt+F3/Configure) that make it possible to set up remembering various properties of specific windows. This button makes setting this up faster and simpler. Left clicking the button makes KWin remember the window geometry, right clicking brings up a menu that allows remembering:
Stacking (keep above/below status)
No border status
Currently decorations with support for this button are Plastik and KDE2. It also may be necessary to first go to decoration configuration and enable the button.
See http://home.kde.org/~seli/kwin_remember for details.