On Windows, I was adding files at the command line. I added one as "tagger.rbbas" when it was "Tagger.rbbas." It added fine as "tagger.rbbas" but the extras command shows "Tagger.rbbas" as an extra yet when adding "Tagger.rbbas", Fossil ignores the command as it already has "tagger.rbbas."

<verbatim>
C:\MyProject> fossil add Abc.txt Def.txt tagger.rbbas

C:\MyProject> fossil changes
ADDED Abc.txt
ADDED Def.txt
ADDED tagger.rbbas

C:\MyProject> fossil extras
Tagger.rbbas

C:\MyProjects> fossil add Tagger.rbbase

C:\MyProjects> fossil extras
Tagger.rbbas

C:\MyProjects> fossil changes
ADDED Abc.txt
ADDED Def.txt
ADDED tagger.rbbas
</verbatim>