I even gave it a static IP (using 'LAN setup' on my netgear router) and it easily prints over the wireless

I was only able to get wireless printing setup using a static IP

As one reviewer already suggested, the solution is to assign the printer a static IP

From the LCD screen I set the printer to use a static IP address, having read that DHCP has caused disconnect problems for some users.4

Google "DCPL2540DW static ip" and follow instructions on the first result page to assign a static IP to the printer.

Set your router to a static ip address for the printer4

Even with setting a static IP address, and installing the drivers & software the second printer, it was up and running in about 1/2 of an hour.

Using a static IP now

If you get it at a good price I can highly recommend it, but expect to spend some of your precious time and frustration limit fighting with wifi disconnects and trying solutions like typing a static ip setup with the horrible little key entry interface.

Has to do with the dynamic IP address instead of having a static one.

Will not stay connected, thru either WiFi or Ethernet, under Yosemite; even with a static IP address.

The set up is complicated and not stable because of the dynamic IP issue