Sometimes, it pays to read the manual. I happened to glance at it while I was doing my installation last night and noticed that there are four required hotfixes you need to install prior to installation of SharePoint 2013 RTM. You install these after installing the prerequisites via the newly named Microsoft SharePoint Products Preparation Tool.
Here are the required hotfixes.
The first two actually require you to enter your E-mail to receive the link. The latter link directly to the download themselves. In my particular install, I found that I could install the first three, but the fourth one said it was not applicable to my system. I proceeded without it and I haven’t seen any major issues (aside from not being able to install Workflow Manager 1.0). However, I don’t think that is related to the hotfix.