Koen Verbeeck (8/22/2013)
You'd be suprised what you can find these days 🙂
In the same file something was doing MATH on a phone number column during import.
So 212-555-5555
or 212-555-5555 / 212-555-5556
Were being treated as expressions. They were saved as General format in Excel. When I changed the format to Text, they went in fine.