Hello Forum Users,
I wanted to let you know, and the author of CCIE Reference Sheets(since I saw that he posts in this forum), that I found an error in the OSPF section under stub areas.
One section says OSPF stub areas block LSA types 4 and 5, but the table on the next page says stub areas block only type 5 LSAs.
I already notified CiscoPress but I haven't heard back.
Hopefully the author will have time to check out these findings and update the errata.