Description of problem:
When printing a page from Firefox, the print output looks like this:

[...]
%%BeginProlog
/setpagedevice where
{ pop 2 dict
  dup /PageSize [ 595.25 841.9 ] put
  dup /Policies 1 dict
    dup /PageSize 3 put
  put
  setpagedevice
} if
[ /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
[...]

but I think it should look like this:

[...]
%%BeginProlog
%%BeginFeature: *PageSize A4
/setpagedevice where
{ pop 2 dict
  dup /PageSize [ 595.25 841.9 ] put
  dup /Policies 1 dict
    dup /PageSize 3 put
  put
  setpagedevice
} if
%%EndFeature: *PageSize
[ /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
[...]

See CUPS STR #1542 for the original complaint:
  http://www.cups.org/str.php?L1542

==>
Please note: Mozilla's output also contains a setpagedevice command without a
corresponding Begin/EndFeature pair, which might cause problems with some
printers...

Please file a bug upstream with them to add:

    %%BeginFeature: *PageSize sizename
    ... existing code
    %%EndFeature: *PageSize

"sizename" would be "Letter", "A4", etc.
<==

Version-Release number of selected component (if applicable):
firefox-1.5.0.9-3.fc6

How reproducible:
100%

Steps to Reproduce:
1. Print something (anything) to file, and examine the results