The site now says September 18, with PB coming to Moscow on September 10 to present the film. (What's he going to do there for a whole week?) I'm pretty sure I didn't make a typo last time. Anyway, here's the source - itar-tass.com/kultura/1420110 - you can look at some screenshots there, though I doubt they're new. ITAR-TASS is a reputable source, so unless the dates change for some reason, that's what they'll be.
P.S. Dammit, the star of "Solaris" died on Thursday. Not that "Solaris," that real one, made by Tarkovsky. Was it really necessary? He used to be one of my favorite actors.