Description of problem:
There is not a PDF reader in the XFCE Live CD, and Midori (the default browser)can not open PDF files.
Version-Release number of selected component (if applicable):
Try to open a PDF File in the XFCE Live CD or in XFCE Desktop just instaled from Live CD
I've added evince in in:
so it should appear in the next nightlies/test composes.
Thanks for reporting this!