in windows, the file system is case insensitive.  fossil allows the addition of the same file twice differing only by case.  both files show up in the ui but technically they are versioned separately even though they are the same file on disk; it is unclear which artifact dominates on fossil open/update.

<pre>
PS C:\fossil> fossil new test.f
project-id:
server-id:
admin-user: rwilso20 (initial password is "ab6ad5")
PS C:\fossil> md test
PS C:\fossil> cd test
PS fossil open ..\test.f
PS notepad camelCase.txt
PS fossil add camelCase.txt
ADDED  camelCase.txt
PS fossil add camelcase.txt
ADDED  camelcase.txt
PS fossil commit
notepad
'gpg' is not recognized as an internal or external command,
operable program or batch file.
unable to sign manifest.  continue [y/N]? y
New_Version:
PS fossil ls
UNCHANGED camelCase.txt
UNCHANGED camelcase.txt
PS fossil ver
This is fossil version [076f7adff2] 2009-10-13 16:25:41 UTC
PS
</pre>