Pravda and other normally reliable sources are reporting that 31-year old centre back Leon Cort is coming in from Burnley on a year's loan and this has now been confirmed.
Clarets sources are not too complementary about the former Dulwich Hamlet, Millwall and Palace player, but presumably he is being brought in as cover: http://www.burnley.vitalfootball.co.uk/article.asp?a=253206
His Wikipedia entry is here: http://en.wikipedia.org/wiki/Leon_Cort
He was player of the year for Palace in 2007 and was Stoke's (then) record signing. It has been suggested that he has become injury prone.
Unconfirmed reports are stating that Ryan Lowe has turned down a move to Charlton for family reasons.
Another unconfirmed report (Sky is one source for this story) says that Charlton have expressed an interest in Crawley striker Matt Tubbs: http://en.wikipedia.org/wiki/Matt_Tubbs
Tubbs scored 40 goals in 48 appearances in all competitions last season.