I recently came accross this error when trying to sync photos to my ipad. After some research I found that the problem is to do with the ipod photo cache.
The following fixed the error;
PC
Close iTunes
Go to your My Pictures or Pictures folder
Delete the folder called “ipod photo cache”
Repen itunes and sync your iPad
The ipod photo cache should then rebuild.
MAC
Close iTunes
Go to your home folder in finder.
Open your pictures folder.
Right click on iphoto library and click on show package contents.
Find “ipod photo cache” file and delete it.
Close finder.
Reopen itunes and you sync iPad
The ipod photo cache should then rebuild.