My operating system of choice is Fedora and I have it running on multiple computers. One of the computers has the partition containing the "home" directories encrypted, so I am required to enter a password every time the computer boots. It is common for this machine to boot to a blank screen.
I decided to upgrade from Fedora 12 to Fedora 13 the other day. I followed most of the usual recommendations
I did experience a few difficulties. In fact, I have likely not found all of the little gotchas yet, but, this is what I know so far:
I usually try to install the 64-bit standard distribution of OpenOffice.org, as opposed to the Fedora built release. I totally ignored this and I had to uninstall and then re-install OOo before it would function. So, that was problem 1, and it was not really a surprise.