I've currently got the nx-1.5.0-1.centos4.i386, freenx-0.5.0-8.c4.noarch, and nxclient-1.5.0-141.i386 packages installed on a couple of CentOS 4 update 3 systems and I'm getting the same results on all of them. I got the new version of freenx via "yum update" and it appears to have "broken" fullscreen mode. The connection config file I have been using does have the "fullscreen" option set (<option key="Resolution" value="fullscreen" />) but wheras it used to really go into fullscreen mode it does not since the update. I now see the top and bottom panels from the "parent" display and a window title on the NX client window, which is not what I was getting in "fullscreen" mode with 0.4.4.
I reran the connection wizard and created a new connection, insuring that the options were what I wanted, but it still has the same behaviour. I downgraded freenx to the 0.4.4-1.centos4 package and the expected behaviour returned.
Am I screwing up somewhere, or did I miss something in the documentation? Any thoughts? Thanks!