Oh good, another thread about file sharing / printing between Vista and Mac ... Anyhow, here is my mystery. I have an Macbook Air with current version of Leopard and a pretty new HP desktop with up-to-date Vista Home Premium running. Networking is being handled by an Airport and generally it all works fine. In the past, I setup a shared printer on the Vista machine and it worked fine. I also have occasionally transfered files between the machines, though I was never able to get Finder's Sharing section to see the Vista machine. I would remote mount a Samba disk to do the sharing and that worked fine. I haven't used either facility in some months. Today, I tried both and ran into problems with both. The printing error is NT_STATUS_CONNECTION_REFUSED. An attempt to connect a shared drive in Finder results in a message about the machine name not being found. I tried many things, including reinstalling the printer (it worked fine, then stopped) and enabling NTLMv2 authentication in smb.conf. Everything seemed mysterious until I figured out the pattern. And the pattern is this... If I reboot my Mac, I can mount a drive one time and print one document. After that, neither printing nor remounting the same drive works. If I reboot, then the queued document prints and I'm then back to not being able to print. Anyone encounter this works-once behavior before? I'm quite mystified by it! Edit: of course, immediately after hitting "Submit", I got a new behavior. The printer woke-up and printed one of the queued documents, this after sitting dead for about 10 minutes, but I didn't reboot. The second document in the queue once again is getting the "connection refused" error.