OK - For a couple of years, I've been working from home on my Powerbook. 10.3, with Apani Contivity client for a secure tunnel to my corporate network. Using X11, I would ssh to various Sun machines, then push the displays back to the Powerbook. Worked flawlessly. This week, I put a bigger hard drive in the laptop and did a fresh OS install of 10.4. The Apani Contivity client (newer version for tiger) works fine - I can ssh to the Sun machines, reach web sites, etc., on the corporate network. However, I cannot push X displays back. If I remember correctly, in my 10.3 setup I had the firewall turned on, with ports 6000 through 6007 enabled for X11 traffic. In 10.4 I have turned the firewall off, and still can't get displays. Unfortunately, on the client application side, there are no error messages - I type the application name at the UNIX command prompt, and nothing at all happens. FWIW, I installed the Apani client on another 10.4 machine - same behavior. Connecting to the corporate network is fine, but no X displays. Did something change in the OS or X11 between 10.3 and 10.4 that's causing this? Does anyone have an idea of what I can do to solve this? Thanks in advance.