Here's an interesting bit, copied from the R&A; Website:
Ian Pattinson, Rules of Golf advisor for the BBC this year, talks about his first few days on the job.
Every Referee on the course (there are 72 from 18 countries) keeps a record of the time taken by his or her group for each hole, the cumulative time for the round (against a ‘time par’) and any rulings given. Some referees also keep a score, although there is no requirement to do this. At the end of each round the Referees return their rules decisions record to David Rickman (Director of Rules and Equipment Standards for The R&A;) and there is a short de-briefing so that any issues or trends that might be relevant to the day – or might be helpful in the planning for the next day — can be discussed.
Each evening after play ends, Shona McRae of The R&A;’s Rules team analyses the rules decisions and prepares a summary to help the referees know what to look out for the next day. First thing each day, I collect a copy of this from the Rules office to give me a heads up.
In the first round, about a quarter of the 56 walking referees gave no rulings. The analysis shows that the rest gave a wide selection of other rulings. Free drops away from Temporary Immovable Obstructions (e.g. TV towers, grandstands etc) were taken by less than ten golfers. The summary for round two tells a different story, with nearly 40 rulings given for casual water – many in bunkers.
There has been a lot of interest in the water in the bunkers. We take the view that the Championship can properly be played under the Rules of Golf and that where there is casual water in bunkers there is somewhere in the sand to drop without penalty which is not nearer the hole. So far I haven’t heard of anyone having to drop outside a bunker under a one stroke penalty.
Another tell-tale sign of the benign conditions has been the fact that in two days, 156 golfers have played 5,616 holes and there have been less than twenty unplayable balls. As I am a bit of a hoarder of rules stuff, I have the records of the rulings going back to the 1995 Open and can see that unplayable balls were easily the most often “popular” rulings given in both the ’96 and ’01 Lytham Opens.