After a client computer links to the server for the first time, Invoice and Report templates are uploaded from the server as expected. While Report templates can be opened for editing in the Visual Template Editor, and saved after editing, the thumbnails for all report templates are blank white rectangles. Thumbnails for all Invoice template display a miniature of the template normally. Edits performed on the client are synced back to the server and other client computers, but the thumbnails on the clients don't change from the blank rectangles.
This behavior is displayed on both clients in my setup. The server displays normal thumbnails for both Invoice and Report templates.