Importing CSV - GET URI too long with error message

When importing a list of 137 subscribers (with first and last name data) I get a server error telling me the URI request is too long.

Looking at the query string I see this..

message=<br+%2F>These+emails+are+incorrect%3A<br+%2F>...(which goes on to list averything, it seems)

I'll have to sort out WHY they are incorrect addresses, but I wanted to report the error handling bug.