Icons missing in KMail RegExpEditor

Hallo! I have upgraded Suse8.2 to kde 3.1.3 using rpms from leo.org's ftp site (and the online update facility of YaST). All seems fine however the icons in the KMail Regular Expression editor are blank (ie those in the toolbars in the top of the Regexp editor). The tool tips will appear on hover and all other icons in kmail are ok. Has anyone else had this problem? KRegexp is a part of KDEUtils and I have the following versions installed: kdeutils3-extra-3.1.3-19 kdeutils3-laptop-3.1.3-19 kdeutils3-3.1.3-19 Any tips on where to check in case the icon files are missing or other ideas would be most welcome. Many thanks Richard Andrews