I'm confused, too:
the release starts with 853. - but in the description 8.5.2 is mentioned?
Release Name 853.20120605-0921
Build Number (used by version checker)
Released On 07.06.2012
Released By Uwe E. Jandt
Released for ND version R 8.5.2
Status Released
so is it an 8.5.2 or 8.5.3 update?
thanks, Uwe