No preview for jpeg files!

Hi, I am using KDE 3.0.3 on SuSE 7.3. Preview of gif files works fine in konqueror but not for jpeg. However libjpg is installed and the image will be displayed when I click on it. I also can open jpeg's with Kuickshow. But I can't open a jpeg image with Kpaint or Kview - I assume it relates to the same problem why there's no preview in konqueror. Thanks for any help. Andrew