I somehow lost 4.5GB in 3Gs to iphone 4 transfer. I backed up 3gs, then activated Iphone 4, then restored iphone 4 from backup. All music, photos and app numbers are the same. The only significant difference is in the "other" catagory when looking at storage through itunes.

I am worried that there may be problems that I am unaware of because of this missing data. Does anyone have any idea what type of data is stored in the "other" catagory and what might have happened. I really appreciate the help.