Discovered the problem when I opened file:///usr/share/doc/doxygen-1.9.7/html/index.html in a browser. Fixed the problem speculatively in that top index with # bzip2 -dc /usr/share/doc/doxygen-1.9.7/html/doxygen_logo.svg.bz2 > /usr/share/doc/doxygen-1.9.7/html/doxygen_logo.svg Then fixed it globally with # find /usr/share/doc/doxygen-1.9.7/html/ -name \*.bz2 -print0 | xargs -0 bzip2 -d It also seems dubious that the default doc artifacts are installed to /usr/share/doc/doxygen-1.9.7-r1/, but the +doc manuals (HTML and PDF) go to /usr/share/doc/doxygen-1.9.7/.
Yeah, these need to be docompress -x'd.