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Did you install these packages using urpmi, or manually. If you had used urpmi, you should not have experienced this problem. A possible solution would be to uninstall libpng and your multimedia apps and then reinstall it as well as your multimedia apps using urpmi and all dependencies should be automatically resolved.
When I was still using mandrake, I only ever had problems like that when I tried to use "non-mandrake" rpms. Eventually I just said "sod it" and went to the easy urpmi site, followed the instructions exactly, and got mirror sources for everything.
It meant that whenever I installed something, I could usually find it in the list of available software - the only thing to remember, is that you can sometimes have multiple sources for the same packages - If that was the case, I always went for the version provided by the PLF, cos their stuff usually had more "bells and whistles", and was more visually pleasing (eye candy - yum yum!). Plus the PLF often released newer versions of stuff, sooner than mandrake did!
Thanks for your responses.
Yes, I was downloading libraries from rpm.pbone.net to get the media players to work. I didn't know about urpmi until recently
I tried to remove all traces of libpng but when I used urpmi to reinstall it I get the message "everything already installed."
I'm not sure if this is meaningful, but when I try to use the urpmi.update libpng command I get also get "trying to select nonexistent medium "libpng." So it's already installed and "nonexistent"? Is my urpmi options screwed? If so, should I try downloading and installing an rpm package through lynx?
Again, I really appreciate your comments. I'm learning, but I'm in one of those jams where moving my files to my external drive and reinstalling Mandrake would be the quicker fix (I'm an ultra newbie).
I'll hold on another day. Your help is greatly appreciated.
If you keep getting an error message that it not installed, download it from a Mandrake urpmi repository or mirror. Install it (you may have to force the installation using --nodeps and --force if the system insists its installed. Once thats done, install other packages using urpmi.