I’ve just received the latest update to OSIs which appears to have been introduced in October. There are a few housekeeping changes including deletion of the now redundant OSIs between Blackfriars NR and Temple/Mansion House. They’ve also deleted the OSI between the parts of Wembley Central as you no longer have to leave the station to get to the Southern platforms.
On the plus side they have introduced a new OSI between Ickenham and West Ruislip as suggested by a visitor to this site back in September 2011. They have also added same station OSIs at both Richmond and Woodford, apparently to accomodate step free routes which require leaving the station and re-entering at a different point.
Finally, there are some OSIs relating to the Emirates cable car in the list. I’m informed that these have no effect on Oyster cards but are there to allow paper tickets to be returned for souvenir purposes.