Notepad++ v.3.9, Windows XP SP2

1. Create a txt file, can be any size, or use any existing txt file.
2. In Notepad++ call the Open Dialog and then enter the file path as "<file path>\<filename>" (mine was "C:\TEMP\1.txt "). Mind the quotes!

Notepad++ will first ask you:
File doesn't exist. Create it? and two options, Yes/No

If you select No, nothing happens.
If you select Yes, Notepad++ will tell you:
System Err
The filename, directory name, or volume label syntax is incorrect

After you press OK, Notepad++ will close itself, loosing Notepad++ history and any unsaved data in open documents.

This is a critical defect. Correct fix would be to let user define file path with quotes (Notepad and UltraEdit work seamlessly with such filepaths).