I have been fighting the exact same problem since iTunes 11.2.2.3 was installed. I would get the error when syncing both my iPad and my iPhone. After researching the issue it seemed to be related to "Blocked" files being synced. The files in question were without exception .mp3 and .jpg files that people had given me. I found I could right click on the file, check the properties and there was an Unblock button that would clear the problem for that file. Unfortunately, my iTunes library was littered with this type of file and there was no way to go through one file at a time. This was also the case with a folder of Photos I had synced to my iPad. There were many references online to a program called âStreams.exeâ, that was supposed to fix blocked files, but repeated attempts failed to unblock my files. After many hours of reading I did find a solution. I created a .zip file of the folder of .jpg files I was syncing on my iPad. I deleted the original folder and replaced it with the contents of the zip file. The end result was I had the same files but none of them had the Block. I repeated this process in my iTunes music folder with the same result. It was a time consuming process, given I had over 6,000 files in my library. If you have more than they I feel sorry for you. At least I can sync both devices without the error message now. Since then I just check the files before I add them to iTunes and the problem has not reappeared. Hope this helps!
