FWIW, I had to discontinue using the print server on my DNS-323. Apparently, either my print driver or the LPD support on Windows 7 has a memory leak. After a couple of days, the spooler was consuming 1.3 gigabytes of memory. The cure was connecting that printer directly to my machine and eliminating the print server. Since I used the same drivers to connect it directly, I'm guessing the LPD support was the issue.