I had this problem too, and have found a solution. This applies to:
Bug#275098: Konqueror won't display JPEG thumbnails http://lists.debian.org/debian-qt-kde/2004/10/msg00094.html and http://lists.debian.org/debian-kde/2004/10/msg00211.html The short fix: 1. From a konq. window, go to Settings > config konq > previews & meta data... 2. check the box for Local Protocols (why this got turned off I don't know). I have the 2 check boxes checked also. 3. you may need to press reload to get the pictures to arrive in your icons. A longer way around: Create a new user, log on in KDE and let it set itself up. Check icon previews work. If they don't, I probably can't help you. Then log out. then temporarily move your ~/.kde/share folder away, and copy the share folder from your new users's account. chown you.you ~/.kde/share -R and log in on kde as you again. Obviously all your settings are missing, but check thumbnails are working. Now, I found that by fiddling like this, then replacing /share again with my old, original one, thumbnails started working again. Wanting a bit more of a scientific answer, I then got a working copy of my share directory and the original broken one, did md5s on every file, and diff'ed the ones which had changed. While I admit this wasn't that enlightening, I did find some potentially relevant things: in share/config/konqiconviewrc the IconSize was set to 0 on the broken one(!) also, check the [PreviewSettings] in kdeglobals. Here's my working one: PreviewSettings] BoostSize=true MaximumSize=1048576 UseFileThumbnails=true ar=false devices=true file=true fish=false floppy=false fonts=true ftp=false imap=false imaps=false ldap=false mac=false man=true nfs=false nntp=false pop3=false pop3s=false print=false printdb=false programs=true settings=true sftp=false smb=false smtp=false smtps=false system=true tar=false webdav=false webdavs=false zip=false I have 2 computers and they both fell sick with this thumbnail business and it really annoyed me. It's one of the great things about konqueror, and konqueror (and kmail) is really the only reason I use kde. I really like the bigger preview that comes in the tool-tip type popup. Anyway, hope it works for you all too. rich
