On my iMac I get am empty folder "iPod Photo Cache" on my desktop each time I sync my iPhone through iTunes.
How I can permanently get rid of this?
I'm not aware of a way to physically delete the folder, however I found a way (with a little help from Google) of removing it from your desktop:
This method basically moves the folder somewhere else so you don't have to see it/delete it every time you sync. If you do find a way to permanently delete it, please share!