The URLs of local files should be stored as the user entered them, including spaces, instead of converting the spaces into "%20".
Spaces are kept in FreeMind 0.8.0, and of 0.9.0 beta 17. Spaces are replaced with "%20" in FreeMind 0.9.0 beta 18. This change in IMHO a regression, a step back.
The behavior required by me causes no technical difficulties AFAIK.
Example: The address "C:\Users\Dan Polansky\Documents" should remain as it is, instead of being converted to "C:\Users\Dan%20Polansky\Documents".
Model applications: (a) OOo Writer and (b) MS Word do keep the spaces in the paths to local files, in align with the behavior required by me.