This problem doesn't ring a bell - what happens if you do the following?
Open Utilities folder
Launch Keychain Access
Select Keychain First Aid... from the Keychain Access menu
If that doesn't find any repairable problems (or if repairing them doesn't fix the problem), we'll need to gather some more information about what's going on here. Please contact the
support ninjas so we can help.
(ttarchala, are you able to sign onto your iDisk from the Go menu in the Finder?)