Binaries are currently not available for patch releases.
To get the source of the head of the v5-10-00-patches branch do:
svn co http://root.cern.ch/svn/root/branches/v5-10-00-patches root
After obtaining the source read the file README/INSTALL (broken).
Changes in the head of the v5-10-00-patches branch
- Fix memory leak which happens when the content of the basket does not compress well (aka it should be rare).