Description of Problem: 

Running through the TUI installation, on the BootLoader Configuration
Screen, there is the option to edit the Boot Label.  However, the default
Boot Label, "Red Hat Linux", is not acceptable to this change dialog -- the
error returned is Invalid Boot Label: Boot lable contains illegal
characters (I'm assuming this means spaces).


How Reproducible: 

Always

Steps to Reproduce:

1. Attempt to edit the Boot Label on the Boot Loader Configuration screen
2. Try to enter in any label that has spaces in it, like the default
3. enjoy the error message

Actual Results:

Error "Boot label contains illegal characters"

Expected Results:

Change of boot label to the label I specify with spaces in it, like the
default.

Additional Information:

If the default can have spaces, why can't the label that I specify have
spaces?  Is the default label invalid? :)  It would also be useful for the
error message to say *which* characters are invalid, but that's icing on
the cake -- I don't think anyone cares enough to bother about that.