Posting a link to an tabloid article about her current post-fame life, saying that "'Kate got fat! Kate got fat! Kate got fat!' is older news than Moses," and that while she's no longer interested in being a public figure, "I've noticed a bit of interest in this page in the last 24 hours so I thought I'd say G'day!"
Today, her posts to the page have taken an angrier tone - with much of her anger directed at James Packer, her partner for seven years until the pair broke off their engagement in 1998.
Packer, who married twice after his engagement to Malkah (then Fischer), is currently engaged to pop superstar Mariah Carey.
He has not made any recent public comment regarding Malkah.
Malkah turned her back on the limelight around a decade ago, embracing Orthodox Judaism, legally changing her name and embracing a new career out of the public eye.
By contrast, Packer's high-profile wedding to pop diva Carey is set to be documented in an eight-part reality series, Mariah's World, screening on E! in December.