….and this is why you don’t go an just load a whole load of “crap” into your directory.  One common thing we hear is that people want to load photos into Active Directory, this is exactly the reason I say to BE CAREFUL.  If you bloat up your directory it requires more memory and if you later decide to shrink the directory it’s a process you have to complete on EVERY domain controller.

http://www.frickelsoft.net/blog/?p=238