Description of problem: A number of images referenced by the online manual are named as .png and served with Content-Type: image/png, where the actual data is not a PNG image but a GIF image. Consequently, standards-conforming software will not display these images. [One could question that assertion, but it is at least true as far as the http/1.1 RFC is concerned (rfc2616 §7.2.1), while it's recommended practice "if possible" according to the MIME sniffing spec (§1) that the html5 spec references. I see that both Gecko and WebKit do display the images, though I suppose it must affect some software.] Below I list the URLs that I'm aware of that are affected by this, but you might like to try find -name '*.png' -print0 | xargs -0 file -N | grep -v ': PNG' on the web server (or the corresponding source tree) to find other instances of the problem. Known referencing HTML documents (generated by Publican from a docbook source): http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4/html-single/Reference_Guide/index.html http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4.1/html-single/Reference_Guide/index.html The affected GIF/"PNG" URLs referenced by those HTML documents: http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4/html-single/Reference_Guide/images/software-manager/icon_bug.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4/html-single/Reference_Guide/images/software-manager/icon_enhance.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4/html-single/Reference_Guide/images/software-manager/icon_event_errata.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4/html-single/Reference_Guide/images/software-manager/icon_event_package.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4/html-single/Reference_Guide/images/software-manager/icon_event_pref.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4/html-single/Reference_Guide/images/software-manager/icon_event_system.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4/html-single/Reference_Guide/images/software-manager/icon_pending.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4/html-single/Reference_Guide/images/software-manager/icon_security.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4/html-single/Reference_Guide/images/software-manager/icon_unentitled.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4.1/html-single/Reference_Guide/images/software-manager/icon_bug.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4.1/html-single/Reference_Guide/images/software-manager/icon_enhance.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4.1/html-single/Reference_Guide/images/software-manager/icon_event_errata.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4.1/html-single/Reference_Guide/images/software-manager/icon_event_package.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4.1/html-single/Reference_Guide/images/software-manager/icon_event_pref.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4.1/html-single/Reference_Guide/images/software-manager/icon_event_system.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4.1/html-single/Reference_Guide/images/software-manager/icon_pending.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4.1/html-single/Reference_Guide/images/software-manager/icon_security.png http://docs.redhat.com/docs/de-DE/Red_Hat_Network_Satellite/5.4.1/html-single/Reference_Guide/images/software-manager/icon_unentitled.png Version-Release number of selected component (if applicable): Version 520 according to the "Send us your Feedback" / "Senden Sie uns Ihr Feedback" section. (Last-Modified http header says 06 Oct 2011 GMT.) How reproducible: 100% Steps to Reproduce: 1. Retrieve one of the "PNG" files listed above. 2. Use the "file" command or look at the first few bytes of the file to observe that it's a GIF file rather than a PNG file. 3. Use curl --head or similar to look at the http header and observe that the Content-Type says image/png. Actual results: Mismatch between Content-Type and format of actual file. Expected results: Match, whether by renaming to .gif (and updating the referencing documents) or converting to png. Additional info:
Committed revision 83134 Ran script to: * Rename problematic PNGs to GIFs * Convert GIFs to PNGs using ImageMagick * Delete the GIFs Files affected: M images/software-manager/icon_unentitled.png M images/software-manager/icon_event_errata.png M images/software-manager/icon_event_system.png M images/software-manager/icon_bug.png M images/software-manager/icon_security.png M images/software-manager/icon_pending.png M images/software-manager/icon_event_package.png M images/software-manager/icon_event_pref.png M images/software-manager/icon_enhance.png