Don’t panic, but portage is about to tell you to downgrade your MPlayer. It’s a boring story as to why, but suffice it to say the versioning scheme is fixed now, and you can “downgrade” if you want to or not, though the ebuilds and versions are exactly the same. In other words, you can re-emerge it or do nothing and you’ll be fine either way.
More info here on this forums post.
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