PP 26-27 of hardback: Harry received an owl from the Ministry of Magic   
   summoning him to a disciplinary hearing for having cast a Patronus Charm (in   
   front of a Muggle and in a Muggle populated area) in violation of the rule   
   against underaged wizards using    
   magic out of Hogwarts.  3 years earlier, Harry had received a warning letter   
   for using a Hover Charm, and it wasn't even him!  In DH, Harry receives   
   confirmation that the MoM can detect magic done around underagers via the   
   Trace, but can't tell who did    
   it!  Hence, if ANY magic is done near Harry when he's at "home", HE (being the   
   ONLY wizard at Privet Drive) gets the blame!   
      
   P 47: Several Order of the Phoenix folks come to rescue Harry.  A witch does   
   the "Lumos" spell.   
      
   P 53: Tonks does magic to pack Harry's trunk, clean Hedwig's cage, and move   
   his trunk.  These spells were done near Harry.  Why didn't the MoM detect that   
   magic and send Harry some more nasty letters?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)