the release notes only list fixes since the previous service pack. if you were on 18.104.22.168, then you'd want to view the fixes for SP1-SP4, but if you are on SP3, then view these only. it is likely (although i haven't verified) that the fixes in HF1-HF4 for SP3 are included in the documentation.
In the beginning the Universe was created. This has made a lot of people very angry and is widely regarded as a bad move.