The excellent FreeMind mind mapping tool started to play up when I tried to use it on Leopard. I couldn't use the keyboard to insert a new child node, a pretty basic function really. I apologise to anyone at last nights Perl Mongers meeting distrurbed by me pounding (gently) on my machine trying to make it work during the presentation, as I have taken to using Freemind for note taking.
The fix turns out to be very simple. In Tools/Preferences/Keystrokes (scroll down a little) make TAB the shortcut for 'Add Child' as well as 'Add Child Mac'