What are the changes between 1.5.13-rc9 and rc11?

In two days there where 3 beta updates from rc 9 to rc 11.
I can not find out the changes between each update.
Because at the update page every changelog is the same with the different rc updates
Does somebody know where to find the changes?

Every update added one or two extra fixes but these rc updates are cumulative as not everyone installed all rc’s in between.
The changelogs where definitely not the same for previous rc’s.