When I request to see any song's lyrics (from TerraBrasil, it's the only source  selected on plugin's preferences) it doesn't download the full lyrics, but only part of it.

For example, I tried to read Led Zeppelin The Rover's lyrics on Rhythmbox and it displays this:         
"            
                
                    
                
            
            
                The Rover
            
            
                Led Zeppelin
            
        
        
I've been to london, seen seven wonders 
I know to trip is just to fall 
I used to rock it, sometimes I'd roll it 
I always knew what it was for

Esta letra foi disponibilizada pelo site
http://letras.terra.com.br"
But the full lyrics are: http://letras.mus.br/led-zeppelin/70555/

Probably the site source changed a little bit but not TerraParser.