My Kubuntu does not render png resources in some programs, for instance synaptic is missing status icons and the synaptic icon legend is missing all icons.

This is the terminal output after launching synaptic (the resource files in png format is where they are supposed to be)

ahq@mybox:~$ kdesudo synaptic 
Warning, failed to load: package-installUnrecognized image file format                                                                                                                                                                      
Warning, failed to load: package-reinstallUnrecognized image file format                                                                                                                                                                    
Warning, failed to load: package-upgradeUnrecognized image file format                                                                                                                                                                      
Warning, failed to load: package-downgradeUnrecognized image file format                                                                                                                                                                    
Warning, failed to load: package-removeUnrecognized image file format                                                                                                                                                                       
Warning, failed to load: package-purgeUnrecognized image file format                                                                                                                                                                        
Warning, failed to load: package-availableUnrecognized image file format                                                                                                                                                                    
Warning, failed to load: package-available-lockedUnrecognized image file format                                                                                                                                                             
Warning, failed to load: package-installed-updatedUnrecognized image file format
Warning, failed to load: package-installed-outdatedUnrecognized image file format
Warning, failed to load: package-installed-lockedUnrecognized image file format
Warning, failed to load: package-brokenUnrecognized image file format
Warning, failed to load: package-newUnrecognized image file format
Warning, failed to load: package-supportedUnrecognized image file format
Warning, failed to load: synapticUnrecognized image file format
Warning, failed to load: synapticUnrecognized image file format
Warning, failed to load: system-upgradeUnrecognized image file format
Warning, failed to load: package-availableUnrecognized image file format
Warning, failed to load: package-installUnrecognized image file format
Warning, failed to load: package-reinstallUnrecognized image file format
Warning, failed to load: package-upgradeUnrecognized image file format
Warning, failed to load: package-removeUnrecognized image file format
Warning, failed to load: package-purgeUnrecognized image file format
Warning, failed to load: package-installUnrecognized image file format
Warning, failed to load: package-reinstallUnrecognized image file format
Warning, failed to load: package-upgradeUnrecognized image file format
Warning, failed to load: package-removeUnrecognized image file format
Warning, failed to load: package-purgeUnrecognized image file format
Warning, failed to load: synapticUnrecognized image file format
Warning, failed to load: synapticUnrecognized image file format