I got a message saying the domains are not compatible with the deity. These are domains of the vanilla game (knowledge and trickery for Oghma).
A relog fixed this, but I was asked to report it anyway.
(account : Unpurposeful, character: Taern Ravensky)
To avoid seeing this happen again (until I can get around to handling it in the script) you need to make sure that you have a use of Trickery Domain Power available before you log out.