Waring messages

Hi,

I have installed FC5 on my PC and built gnuradio.
Everything seems to work fine.
However I get the following warnings
when I run the usrp examples.

where are they coming from?

Thanks
Achilleas

$ ./usrp_wfm_rcv.py
Using RX d’board B: TV Rx

gr_fir_ccf: using SSE
gr_fir_fff: using SSE
FYI: No Powermate or Contour Knob found
GnomePrintCupsPlugin-Message: The ppd file for the CUPS printer crashatl
could n ot be loaded.

** (python:2767): WARNING **: Could not find child for option
“PhysicalSize” wit h id “Unknown”

** (python:2767): WARNING **: Could not set value of “PhysicalSize” to
“Unknown”
GnomePrintCupsPlugin-Message: The ppd file for the CUPS printer priv4403
could not be loaded.
GnomePrintCupsPlugin-Message: The ppd file for the CUPS printer tek350
could not be loaded.

** (python:2767): WARNING **: Could not find child for option
“PhysicalSize” with id “Unknown”

** (python:2767): WARNING **: Could not set value of “PhysicalSize” to
“Unknown”
GnomePrintCupsPlugin-Message: The ppd file for the CUPS printer
altbasement could not be loaded.