Exchange 2003 12 servers. 4 users on server 7 report that 2 make updates and see updates while 2 others see their updates but the first 2 don't see the second two. Only one routing group and admin group with all 12 servers in it. PF refferals on servers all set to use Routing Group.
No clients in cached mode or using calendar in "Favorites"
I ran winroute - all servers show consistent results for RGmaster and connectors.