Description of problem:
Beginning with Fedora 12 and continuing on with Fedora 13, cups does not initialize the USB serial printer correctly (if at all).  It might also be true that no serial printers are initialized correctly, but I don't have a serial port to test with.

Version-Release number of selected component (if applicable):
All shipped versions with Fedora 12 and 13.  Fedora 11 never exhibited this problem.

How reproducible:
Always.

Steps to Reproduce:
1. Configure a printer with the device URI serial:/dev/ttyUSB0 and make and model Local Raw Printer.  
2. Print out a receipt.
3.
  
Actual results:
The output is a stream of several lines of seemingly random characters, whereas the output was correct with Fedora 11.  Tweaking the baud rate, bits, parity, and flow control sometimes result in less random characters, but the output is still full of junk and other control characters.

Expected results:
The same receipt we got with Fedora 11.

Additional info:
I have discovered that if I create the following /etc/minirc.dfl file:

pu port             /dev/ttyUSB0
pu baudrate         9600
pu minit            
pu mreset           
pu rtscts           Yes

and start minicom and then exit with Ctrl-A Q Yes, the next receipt starts with a few junk characters, but the rest is correct and then all subsequent receipts print correctly.  My conclusion from my testing is that some kind of initialization was removed from cups or something changed about the USB serial driver as to require additional initialization that cups is not doing (that minicom does do).

The hardware we're using is a "pl2303: Prolific PL2303 USB to serial adaptor driver" and the serial printers we're using are Epson M129B and M129C receipt printers (they cost around $300 and they're used with most point of sale systems).