http://www.pentaxforums.com/forums/pentax-news-rumors/201457-ff-under-development.html
Everything has no proof of any and rumour is rumour. So, just believe it or not! Btw, these Pentax FF rumours have been with us for years, which seems to be a dream that never vanishes amongst we Pentaxians, maybe until one day a FF Pentax body really comes! ;-)