The "Save Playlist" plugin seems to be case sensitive. Thus, it is possible to
save playlist with names which differ only in the use of capital or lower case
letters (z.B. "List" and "list"). Since on Windows there is no difference
between small and capital letters in filenames there is a problem when those
playlist are (automatically) written to disc. It seems that an existing playlist
is overwritten with the new contents. On the server, however, the two different
playlist do still exist.

Shouldn't playlist names be case insensitive to work for ALL operating systems?

Moreover, the playlist plugin uses small letter as default when saving a
playlist. The first letter is shown as "A" but all further letters are small
letters when pressing right. If you overwrite the first "A" with another
character then this new character is also a lower case letter per default. All
other lists which use this kind of input (e.g. the "Search for" lists) use
captital letters as default input values.

A solution could be to use the spelling of the letters for the playlist names in
the database as they are input but to use only capital letters for the files
which are written to disk. If a new playlist is created using an existing name,
but a different spelling, a warning could be displayed.