1. When I try to create or manage an alert,I am getting " An error has
occurred on the server" Error.
2. I am getting an error with the User Profiles while making changes to
the existing profile, I get an error"An unknown user profile error has
occurred. Try recreating this user profile or updating this user
profile from the directory service to resolve this problem."

We had no problems in till yesterday and suddenly we are getting these
errors. We have not changed anything.