Why CI3 requires ucfirst-case names for all classes?

Although the Ucfirst convention is not an issue, and actually I personally like it as a reminder to ucfirst my controller names, I had a weird experience on Notepad++ and its inbuilt FTP default plugin.

I had a controller correctly named Search and the filename correctly named Search.php on creation, but when I downloaded it, it became 'search.php' and uploaded as a new file called 'search.php'. It took me ages to realise why my changes were not taking affect :-)

It seems to happen on single word filenames sporadically.

Just thought I would mention it as it amused me to find a bug in the awesome notepad++.

Paul.