Too much can often be read into announcements such as delays of movies, but then again often there is. I doubt there's much to worry about for this Tony Scott movie, I mean it's not as if they've finished the film and decided to recut...or could they? According to JoBlo:

The film was scheduled to be released this August but now New Line has decided to push the film back until November 4th. Reasons for the delay were not announced but it is interesting to note that the real Domino Harvey was arrested and charged with conspiracy to distribute drugs, possession, trafficking and racketeering last week. Not sure exactly what impact that would have on the film but it may bide the studio some time to add a brief coda or simply have Harvey available to do press.

I suspect it's to get more press out of the whole situation, but there is the possibility that they've protrayed the character one way and are suddenly deciding to do something slightly different now this news is out. Whatever the reason it's more noise and sparkle for us to be attracted to.