"Is it now more resistend against upper / lower case letters and blanks in path and file names?"

I think this sort of "problem" [1] results from its UNIX origins?

[1] UNIX types actually like things to be case-sensitive - after all, 'C' itself is case-sensitive.
Those of us from PC and/or VAX backgrounds can find this rather annoying: you can entirely change the meaning of some option simply by typing it in the wrong case!

But now I'm digressing from my own topic! :-(