Message "the process android.process.media has stopped"

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http://forum.xda-developers.com – Just started getting this. Doesn't seem to be causing any major issues with apps but what does it mean and how to fix it? It lets me hit "OK" to close the message but then it pops back up randomly. The last few apps I installed prior to getting it were Talkatone and GrooveIP Lite if that has any effect. (HowTos)