I see Rudi Koertzen's to retire after the Pakistan-Australia test at Headingly:
Umpire Rudi Koertzen set to retire (cricinfo)
What are people's views on his career?
Clearly his error count's been rising, but they all make mistakes and Koertzen was generally fair. I seem to recall that 5-6 years back he was voted most liked by the players themselves - which says something about him.
He'll be remembered chiefly for the "slow death", and, unfortunately, probably for the Sangakkara dismissal on 192 in Hobart.