That was tooo easy.
I figured out why Segment names do not show up under the icons in the Library View Pane after testing your level, or saving and reopening your level.
Localization.
Some Language files need to be present in the 'languagebank' for each directory and file in your segment, prefab and entity directories.
Look in ...
languagebank\english\textfiles\library\
(My language version is [english], yours may not be?)
And you'll see your segment, prefab and entity directories.
Look into each one and you will find a file for EACH directory AND file, for ALL your segments, prefabs and entities (that came stock with FPSC). Each file has the extension 'loc' (short for localization I guess).
The directory structure is a mirror of each of the respective directories where your segments, prefabs and entities actually are.
Inside each *.loc file is simply the actual text you want to appear in the Library Toolbar.
The actual names of the Segments while selecting a NEW one seems to go by the filename of the *.fps file, then finds a matching *.bmp file for the icon. And never seems to use the *.loc files till you get over to the Library View Pane. ?
It also seems to use the text in the *.loc files for the text in the 'TreeView' style control you use when navigating your libraries of media.
See my fixed names... Screenshot attatched.
I hope that helps out the rest of you.
Cheers.
Rocky Raccoon