For WB pattern: Try picking a picture with a different datatype to see if your datatype is screwed. (...like if you currently have .jpg, try an IFF)
For MUI: Is your keyfile in the right folder? Does the MUI prefs screen show that it's registered?
For both: Have you got some kind of Env handler running? If so, maybe it's screwing up. Do other prefs have a problem?
