Using the KDE 4.4.5 of Debian 6 the default menu shows as a series of opening folders of various contents, which if you're not quick enough or don't know where to look, close too quickly on you locking you out of them. I much prefer what is called the traditional menu, where folders are listed in descending order and when your mouse hovers over your choice, it opens to the right showing you its contents for you to choose. Much more intuitive!
The way to get this, and get rid of the 'new' menus is to right-click the KDE icon of the menu and 'unlock widgets' and then 'Switch to classic menu style'. Then lock the widgets and job done!