I’m having a real problem with this one too!
It seems to have appeared out of nowhere with a form I’ve been happily using for 18 months! Surely it must be the recent update? I’ve just noticed the recent update note says:
3.1.5.4
(12 May 2012) – Better detection of checkbox config errors.
Thing is . . . . I’ve checked my coding via the FastSecureContact Form website instructions. see link
https://www.fastsecurecontactform.com/how-to-add-extra-fields
and I can’t see any error!!!
The code I used in 2 of the extra fields (when I originally built the forms 18 months ago) are as follows:
{inline},BA;MA;PHD;Other
&
{inline},French;German;Italian;Spanish;Mandarin;Other
The form which these parameters are used in is here:
https://www.sophiemacpherson.com/?page_id=314
Any ideas anyone?