fedora (2.6.40.6 0.fc15.x86_64) and Fedora (2.6.38.6-26.rc1.fc15.x86_64) during boot

It seems like someone has installed one extra system in my computer cus when I press f1 during the boot a blue screen comes up offering me two boot options NOT ONE.

Fedora (2.6.40.6 0.fc15.x86_64)
Fedora (2.6.38.6-26.rc1.fc15.x86_64)

It was just by accident I noticed this f1 command at boot. who knows what more buttons I must press to get a clean install.

Is this a sign of something fishy going on? Can I remove this? If not: witch one should I use at boot? Thank you.

[jayfree]

Fedora (2.6.40.6 0.fc15.x86_64) is an updated kernel from Fedora (2.6.38.6-26.rc1.fc15.x86_64), when a kernel is updated the old one is left behind to fall back on just in case something breaks. You can remove the old one if you are sure everything os ok. At boot time the newest one will be used. This is standard behavior for linux systems and provides a safety net for users, nothing un-clean about it, or fishy, for that matter.

[lightman47]

That second one is a previous version to which a kernel update has been applied - the new/updated kernel then became the default boot (top). I think Fedora will keep the 3 most recent. While only once, I have had to boot into a previous version because of a stupid I had done while running as root.

Thank you guys I understand why that is then. Today has been a good day with me learning a lot about Fedora/Linux thanks to trial and error and threads like this, thanks once more.