I searched on "Release Notes", then filtered my search to v2015. I was presented with a number of "topics" but noted that there seemed to be duplicates. For example the topics all essentially bring you to the same place...
Eagle Release Notes V2015 R2.23
Eagle _Release_Notes_2015R2.23.pdf Maintenance_Release_Notes
2015 R2.23.pdf R2.23
However, I did not know that so I ended up navigating to each one to see if there were any differences. These things should only be returned once.
Also, when providing responses to a Release Notes seach, it would be nice to be able to order them in sequence, i.e. R2.21, R2.22, R2.23, etc.