On the 13th December 2012 , UKBA published yet further amended versions of forms for the majority of categories in the Immigration Rules. Applications made prior to the 3rd January with the older versions will be accepted in accordance with paragraph 34(i) of the Immigration Rules with the caveat that the applications will be considered under the revised Immigration Rules regardless of which version of the application form is sent. All applications from 3rd January will require the new versions. Check your category on UKBA website to ensure the correct form is used to avoid rejection.

https://www.ukba.homeoffice.gov.uk/sitecontent/newsarticles/2012/december/18-application-forms

For advice regarding your specific situation, please do not hesitate to get in touch.