The Forbidden Legend quest line, when the quest log is saying "Read Daynas Valen's Notes"
I have his notes and his journal and reading either does not progress the quest.
(i have tried dropping them and picking them up again, etc)
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On a side note after patch 1.4...
MOST IMPORTANTLY - Played for almost 2 hours last night (with autosaves on) and not one crash.
All my lost books were returned.
Bookcases in Solitude house are now working fine.
Mannequins in Solitude house are now working fine.

I also have the same daynas valen glitch and i have no idea how to fix it and have been unsuccessful in finding a remedy