texlive-doc-2021-alt1_4.noarch	windows-thumbnail-database-in-package	warn	/usr/share/texmf-dist/doc/latex/pdfwin/Thumbs.db: It is the file in the package named <tt>Thumbs.db</tt> or <tt>Thumbs.db.gz</tt>, which is normally a Windows image thumbnail database. Such databases are generally useless in packages and were usually accidentally included by copying complete directories from the source tarball.; ource tarball.;