Viewing JPEGs in Konqueror

I have a strange problem. I'm sure I caused it, but don't know when or how. I can view jpegs using any of my viewers. I can view jpeg attachments with kmail. I can view jpegs within applications such as digikam, open office, or scribus. I can view jpegs with konqueror if I log in as root. I can no longer view jpegs with konqueror if I log in as user (normal login). I have looked at file associations and at the Konqueror preferences. All seem normal. Any ideas on how to fix this? Desperate Bill (SuSE 9.3, KDE 3.5)