Version:            (using KDE KDE 3.3.1)
Installed from:    Fedora RPMs
OS:                Linux

When opening a sub-menu, it always opens at the right, unless there is no space in which case it opens at the left. However that means I have to travel over the entire width of the menu (or submenu) in order to go to the (sub)submenu. I find this particular annoying when moving a window between desktops, my popup menu from the titlebar is quite wide.

Imho it would be nicer if the submenu opens at the side which is nearest. In other words, open to the left when my mouse pointer is near the left edge, and open at the right when my mouse pointer is near the right. Of course there should be space for the menu, so near the edge of the screen this behaviour should be suppressed (and open the submenu only at the direction where there is enough screen space).

This behaviour may be confusing to uniniated users, so it should be configurable to behave like it does today.
For example, when opening a 3-deep nested sub-menu, you need to decide *ahead* whether to open the submenu s at the left or at the right, in order to keep an overview of what you are doing, rather than simply moving the mouse pointer in the direction of where the submenu happens to pop up (which would result in a kind of zigzag stack of submenus, which is quite non-readable).