As hars has indicated this topic has been raised and discussed previously.
To provide help the MM developers resolve this issue please provide them with as much detail as possible.
The screenshot is great but also they need,
Your system details, Software, MM version, OS etc
Hardware, Graphic Card type and driver version
Mediamonkey setup, skin, scripts or plugins.
It may take a bit of time to gather but is vital to soving this problem.
It is to me a part of the same issue. When the player locks up or gets the garbled text then the player will usually go exactly as your screen shot shows.
This has been reported and is also a part of what I am trying to force or eliminate.
If you could post your details as I have indicated so the developers can start to get a better idea the issue.
It seems we have reproduced and also fixed the issue. We'll release some testing version soon, so that you all could check out whether the fix works for you.