If you edit the Title or Comment field in the Explorer, ctrl+z restores the last removed character.
This function is missing if you edit a filename field.
This is inconsistent!
I naturally agree. Thanks for reporting. Don't know how easy it is to fix though. The problem seem to stem from the component used. All other view modes use the JTextArea component (multi line), while the file name view uses the single line JTextField component. One resolution would be to use the JTextArea for all components, but I don't know if I want to allow multi-line file name presentation...