Select List, 'Other" option text field, any text written in textfield 'Illegal Value' error is given In one of my content types, I have an option for a select list with pre-defined values. I have the 'other' field configured, so when selected a text field displays to enter the 'other' information. 

However whenever a user enters information into the text field and attempts to save the form, an "Illegal Value" error is displayed. 

I went in and looked at the configuration and could not see anything wrong. Any ideas?
Are you using http://drupal.org/project/select_or_other ?

Is the field set as required? Take a screen pic of the config for the field.