Other Changes to ArcGIS Online (bad ones in my opinion)
New sharing workflows for public accounts???Public accounts, previously known as personal accounts, can no longer create private groups(december release),(this part was added to march release) join private or organizational groups, or share items to groups unless the items are shared with everybody (public). Existing private items in public groups will remain private; ArcGIS Online will not turn existing private items or groups public.
The fact that a person with a public account can't be invited to use services in an organizational account makes no sense..... I saw no mention of this back in december.