Ubuntu – Epson TM-T88IV not printing from Firefox/Chrome in Ubuntu 12.04

I'm using a procedure successfully used with Debian 6 and Ubuntu 10.04 – 11.04.

Get drivers from Epson POS Drivers

 apt-get install cups libusb-1.0-0 libusb-1.0-0-dev
 unzip TM\ BA\ Series\ Thermal\ Printer\ Driver\ 1100.zip
 cd Epson_TM_Thermal_Printer_Driver_1100/tmt-cups/
 sudo bash install.sh
 sudo chown -R root.root ppd/*.ppd
 sudo cp ppd/*.ppd /usr/share/ppd/openprinting/Epson/ [ or somewhere handy ]

Finish installation in CUPS localhost:631

Problems/Symptoms:
The Good:

• Prints CUPS test pages successfully
• Prints from xterm: Eg., lp<<<"My Very Brief TEST PAGE"
• If web page is printed to PDF first, then sent to receipt printer …it works!

The Bad:

• Does not print from Firefox
• Does not print from Chromium

The Ugly [ Error messages ]:
From CUPS:

stopped "/usr/lib/cups/filter/rastertotmt failed"

Other noteworthy facts:

This printer is a T88IV, Epson does not list drivers for the IV, only the V. So I'm using the drivers for the V — this works in Windows, by the way, use drivers for V and the IV works just fine.

I've checked permissions for all ppd files and directories and matched them to existing ppd files/directories on the system. Printing to a Xerox works fine.

So, how can I get rid of the rastertotmt error above?