We recently upgraded our development version to 4.5.6. Users have noticed an issue regarding document preview (whihc has also been noticed on our production instance version 4.5.5, though not consistently). When a document is created and has some attachments added to it, the preview doesn't seem to work. Is this a noted bug in 4.5.5 and 4.5.6, has anyone noticed the same yet?? Not sure if its version related bug.