I just used preupgrade to upgrade fedora 16 to 17 and it looks like everything went well, but now in my home folder there's 16 folders with names like "preupgrade" "preupgrade-google" "preupgrade-google-chrome" etc. It looks like they're all empty. What is this? I can't just delete them because they're locked, so I'm wondering if there is something else I need to do? I thought I did everything I needed to do to upgrade my system. I think everything else looks normal.
I've tried to google an answer to this but I haven't found anyone else talking about it. It's not a real problem but it just bothers me alot.