What version of VC are you using? By "media" do you mean audio tracks?
Are you saying that, in the past, when a new song started playing there was an on-screen message displaying the song information, and now there isn't? Or do you mean when you ask for song info it isn't displaying, or something else?
In your XJSON plugin settings, do you have the "subscribe to notifications from XBMC" box checked?
On our configuration, we get TTS announcements when a new track starts. We have never had an OSD message. I think that is how the default configuration for Frodo works. Maybe you're thinking of the "Show song info" command? (This is within the "XBMC Get Now Playing Info" command group)
<?xml version="1.0" encoding="utf-16"?>
<command id="845" name="Show song info" enabled="true" alwaysOn="False" confirm="False" requiredConfidence="0" loop="False" loopDelay="0" loopMax="0" description="">
<action>
<cmdType>XJson.Raw</cmdType>
<cmdString>Player.GetItem&&"playerid":0, "properties": ["title", "album", "artist", "rating","playcount","genre"]</cmdString>
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>XJson.ParseTokens</cmdType>
<cmdString>Song: {item.title} {CR}Artist: {item.artist[[ & ]]} {CR}Genre: {item.genre[[ & ]]}{CR}Rating:{item.rating}{CR}Played {item.playcount} times before</cmdString>
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>OSD.ShowText</cmdType>
<cmdString>{LastResult}</cmdString>
<cmdRepeat>1</cmdRepeat>
</action>
<phrase>Show song info</phrase>
</command>