note 9239 rejected and deleted from session_start by ronabop

Has anyone had problems with (what look like) memory leaks with session? I have a script that reads document information from a database (filetype, original file size, filename, mime type/subtype etc), uses this info to set the appropriate HTTP headers, and then uses readfile() to pass the file to stdout. This works absolutely fine until I add session_start() to the script. If I do this while a session is alive, all the documents come through garbled. Take the session_start() call out and it's fine again. Is this due to session hogging memory and messing up readfile? Or something else? Any clues? Cheers Igor.