mediatomb 0.12.0 doesn't build (on Mac OS X 10.6.2 Snow Leopard) when I request libextractor support but have libextractor 0.6.0 installed. Works fine with libextractor 0.5.3. I understand that libextractor 0.6.0 breaks API compatibility so this is not surprising.
checking extractor.h usability... yes
checking extractor.h presence... no
configure: WARNING: extractor.h: accepted by the compiler, rejected by the preprocessor!
configure: WARNING: extractor.h: proceeding with the compiler's result
checking for extractor.h... yes
checking for EXTRACTOR_getKeywords in -lextractor... no
checking for EXTRACTOR_getKeywords in -lextractor... no
configure: error: unable to configure libextractor support
i wrote a patch to make it work with 0.6.x:
http://sources.gentoo.org/net-misc/mediatomb/files/mediatomb-0.12.1-libextractor.patch