Description of problem:
On line 51 in https://bugzilla.redhat.com/bugzilla/css/bugzilla.css, the 
font-family is defined as "mono".

On my various Firefox browsers under Windows and Fedora Core 6 (using both the 
Firefox RPM and Gran Pariso), all comments under RH Bugzilla bugs show up using
a variable-width font vs a fixed width font.

If I save the CSS locally and change "mono" to "monospace", everything looks 
correct.

However, using IE or galeon, the comments correctly use a fixed-width font even 
though font-family is set at "mono".

Should this be set to "monospace" to be valid instead of just "mono" ?

Version-Release number of selected component (if applicable):


How reproducible:
Every time

Steps to Reproduce:
1. View Bugzilla bug at bugzilla.redhat.com in Firefox on Win/Linux
2. Observe comments
  
Actual results:
Font is variable width

Expected results:
Font is fixed width

Additional info:
Other users I discussed this with on #fedora did not all have this same issue.  
However, they felt that using "monospace" was correct and "mono" was not 
regardless.