GBLX router upgrade breaks bgp sessions

[nanog <nanog () wjp net>]

Subject says it all.  GBLX upgraded some edge routers to a new JunOS
release (possibly 5.3 rev 24)- and now our bgp sessions continually
reset with:

Jul 10 06:58:24 MST: %BGP-3-NOTIFICATION: sent to neighbor X.X.X.X 3/3 (update missing required attributes) 0 bytes 

Anyone clueful at GBLX listening?  We've been down for about 4 hours,
and the NOC (call center) people are less than helpful.

bill