I've been subcribed to the Product Updates feed for months. I have certainly received nothing about the latest toolbar hotfix nor the 4.5.2 for Grid.
Looking back over the last alf-dozen or so entries shows:
16 Mar : Reporting 1.0 Beta2 new release
02 Mar : r.a.d.controls for ASP.NET Q4 2006 SP2 new release
16 Feb : Sitefinity Release Candidate
16 Feb : Reporting 1.0 Beta1 new release
12 Feb : r.a.d.controls for WinForms Q4 2006 SP2 new release
No mention there.