When I open my Adventure Compendium, all 3 tabs are completely devoid of content. Same for the quest list in the LFM panel.
I've been experiencing this too. Logging out and back in usually resolves it, but it's annoying.
Also posted here by someone else:
http://forums.ddo.com/showthread.php?t=198381
Many people are experiencing this. I have a brand new install of the game. Not a problem on my side: and issue with Turbine's DDO. Please fix this. Logging in and out doesn't help. Closing the DDO client and re-launching doesn't help. It's been like that for days. I had this happen once before, then it came back. Now it's been blank for days.
Sounds like a database problem on Turbine's side.
IT IS GAME-BREAKING.