The conflict is between Quark and Tiger. Go to http://www.macintouch.com/tiger31.html and scroll down to the Quark section. Here's a nice post from Rick Dowling: In response to Claudia Meyer's problem with the Hide Quark command not working in Quark 6.x when running Tiger, I have spoken to Quark about this. The answer is "we haven't tested XPress 6.5 with Tiger and therefore don't support this combination" On 12/9/05 9:07 AM, Brenda Mitchell <bmitchell at databanque.net> wrote: > We (and several of our clients) have been unable to hide Quark from > the pull-down menu since upgrading to Tiger. Wouldn't think that we > all have the same conflict? We all can, however, use the hide command > from the dock. Interesting.> > >>>> XPress does respect the Command-H as the Hide command. It's right there in >>>> the menu. >>> >>> Yup. It's right there, but ya can't use it. How annoying. Least they >>> could do is take it out of the blasted menu. >> >> You can use it -- at least, it works here... Dunno why it doesn't work on >> your Mac! There must be some sort of conflict.