I notice in the install docs, we list the requirements:

• PHP Version 5.2.1 or greater including
  • PCRE, DOM, JSON, XML, Session, Sockets (required)
  • libiconv (recommended)
  • mbstring, fileinfo, mcrypt (optional)

Should GD/ImageMagick support be added to that? I noticed that distributions are doing it, and there are a few places in the code that use it.