That doesn't make sense. Only paying up for 2010/11 but not for 2007/09, if he insists on being innocent? Either he is innocent or not innocent.
I am a bit disappointed to see him paying up without a fight which kind of indicates some sort of wrongdoing.
Might be he found out something was wrong with his taxes, which wasn't his fault. To me this doesn't seem as if he knowingly evaded taxes, as in this case, he would probably have paid up for 2007/2009, or arranged a deal so he wouldn't have to go to court.
To me this looks like PR, like he's paying something "just in case" to calm down the media etc.