Some users (including an Administrator) get an error on attempting to run a Saved Search: "Your formula has an error in it. It could resolve to the wrong datatype, use an unknown function, or have a syntax error." I (who built the search) have never received this error; the search runs completely fine for me 100% of the time. The formula it doesn't like is abs(to_date({datecreated},'mm/dd/yyyy')-{trandate}) and I'm using it as a Formula (Numeric) criterion.
I've never run into this before; usually if there's any type of "real" formula error, it will not run the search at all for all users. Any ideas?