the cache size option is missing in 2.72
I liked being able to direct the size of the cache file/folder
This was done on purpose as you can essentially really hinder the performance of the drive to the point it could cause a lot of problems if the user didnt quite know what they were doing and what the cache was for
V3 cache management will be a lot more intuitive and easy to control 
but not user manageable?
that is what I liked about it
