This is madness!
I know you know this is considered to be a "feature" by some, but you need to face the truth - it's nonsence.
Rigth now I just can't work with Blender using my exisitng directory structure. I'd need to rename everything so Blender doesn't create "Some_Directory/" when I want to just save a new file to "Some Directory/".
This is squarely insane.
I can't believe something so ridiculous can make it through and stay there in such a fantastic project as Blender, which is easily the leading project in opensource creative tools universe.
Please bring back the freedom to file a and directory naming!
BRING BACK THE SPACE CHARACTER!
Best regards from Tobiasz 'unfa' Karoń - trurly concerned Blender user since version 2.46.