Wenger's record when it comes to buying goalkeepers is piss poor. Only Lehmann was a success and he's bought one a season for the past 12 years.
That said, the decision for the second goal was a fucking joke. Campbell did not intend that as a back pass and to then allow a quick free kick in that position was appalling. If that had happened to Everton we would never hear the end of it.
Just to confirm any doubts that I talk shite
http://www.guardian.co.uk/football/2010/feb/18/steven-pienaar-everton-contract-extension