SCEA5 upgrade exam - wrong pass score on SUN site?

Next monday I'm taking the SCEA5 upgrade exam.
However, while reading the SUN certification site I got confused when looking at the pass scores.

The pass score for the normal part I (so 310-052) is 57%
http://www.sun.com/training/catalog/courses/CX-310-052.xml states: Pass score: 57% (37 out of 64 questions)
Thats all good, if you calculate the percentage, you will see that 37 out of 64 is indeed 57% (rounded)

The exam I'm taking is another exam, since its the upgrade so its: 310-053
http://www.sun.com/training/catalog/courses/CX-310-053.xml states this: Pass score: 70% (29 of 48 questions)

First : why is the pass score for the upgrade exam that high compared to the normal part I?
And most importantly: what is going on with that percentage? ---> 29 out of 48 is 60% and NOT 70%

60% seems more reasonable and more close to the normal part I
It seems that there is a higher chance that their is a typo in the percentage on their site (so 60% instead of 70%) then a typo in the number of correct questions: if you take 39 out of 48 you get 81%.
I was thinking it could had something to do with the individual weigth of the questions or so, but then again, if you check the percentage of the normal part I , its correct: 37 out of 64 is indeed 57% (while 39 out of 48 is not 70%)

Can anyone confirm that it is indeed 60% rather then 70% ?

You could e-mail to Sun. Sun did it again about wrong information on their website.
I think it should be 60%

how are you preparing for the upgrade exam?

Ok, passed the upgrade today with 85%.

I can confirm that the pass score is 60% and NOT 70% (is cearly printed on the exam result paper)
So its as to be expected the same pass score as for the normal part I

Good luck to all future upgrade takers!

Ok, I passed the upgrade today with 85% today.
I can confirm that the pass score is 60% and NOT 70%, so the SUN site contains wrong information (this was cleary indicated on the exam result paper)
So I hope this helps future upgrade takers !