Just a quick note that if you "yum update" using FC2, watch out for the ppp-0-2.4.2-3.FC2.1 package that they put up recently. It has some broken dependencies that conflict with initscripts. The FC mailing list implies that it'll be fixed shortly, but until it is, if you have "ppp" installed, "yum update" on its own no longer works!!
Workaround until the new ppp package is fixed:
"yum --exclude=ppp update"
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