Description of problem: Out of the box there is no thumbnailing. We could easily add this functionality by adding tumbler. It appears to me that it's not included in the kickstart file: http://git.fedorahosted.org/git/?p=spin-kickstarts.git;a=blob_plain;f=fedora-livecd-xfce.ks;hb=master I hope this could be done!
It is not included in the kickstart, but kickstart includes the 'xfce-desktop' group and tumbler is part of it as you can see in http://git.fedorahosted.org/git/?p=comps.git;a=blob;f=comps-f15.xml.in;hb=HEAD#l6696 I added it on February 13th in http://git.fedorahosted.org/git/?p=comps.git;a=commitdiff;h=b9f984b99869ddd0697cc505680fa82c9c151f7a It is in nightlies since February 15th as you can see in http://alt.fedoraproject.org/pub/alt/nightly-composes/xfce/logs/20110215.23-i386.log The problem you see only applies to comps in F14. One more reason to mention the version number of the affected component when you file a bug. ;)