For many years, Quark has maintained a public list of problems they know about in QuarkXPress. (Good for you, Quark!) The list of “QuarkXPress 9 Known and Resolved Issues” is available here.
For the newly-released QuarkXPress 8.5.1, see the list here.
The items in both lists could impact your workflow. I highly suggest giving them a quick read-through, and possibly printing out the list for your co-workers.
Jay Nelson is the editorial director of PlanetQuark.com, and the editor and publisher of Design Tools Monthly. He’s also the author of the QuarkXPress 8 and QuarkXPress 7 training titles at Lynda.com, as well as the training videos Quark includes in the box with QuarkXPress 7 . In addition, Jay writes regularly for Macworld and Photoshop User magazines and speaks at industry events.