Usage of Amarok::config()
-------------------------
We provide this method for convenience, but it is important to use it properly. By
inspection, we can see that we may produce very obscure bugs in the wrong case:

 | KConfig
 | *config( const QString &group )
 | {
 |    //Slightly more useful config() that allows setting the group simultaneously
 |    KGlobal::config()->setGroup( group );
 |    return KGlobal::config();
 | }

Take the following example:

 | void
 | f1()
 | {
 |    KConfig *config = Amarok::config( "Group 2" );
 |    config->writeEntry( "Group 2 Variable", true );
 | }
 |
 | void
 | doStuff()
 | {
 |   KConfig *config = Amarok::config( "Group 1" );
 |   f1();
 |   config->writeEntry( "Group 1 Variable", true );
 | }

We would expect the following results:

 | [Group 1]
 | Group 1 Variable = true
 |
 | [Group 2]
 | Group 2 Variable = true

However because the config group is changed before writing the entry:
 | [Group 1]
 |
 | [Group 2]
 | Group 1 Variable = true
 | Group 2 Variable = true

Which is clearly incorrect. And hard to see when your wondering why f1() is not
working. So do not store a value of Amarok::config, make it a habit to just 
always call writeEntry or readEntry directly.

Correct:
 | amarok::config( "Group 1" )->writeEntry( "Group 1 Variable", true );