When a user types into a text field and presses enter, different
behaviors have been observed. When there is one text field on the form,
the data disappears; when there are two fields on the form, the
data stays in the fields (the expected behavior).
There are many instances when the typed in data needs to be processed by the
form before sending to the server; this issue definitely impacts such cases.
Try the pages linked below, and note the odd behavior.
Form with one text field
Form with two text fields