I have my iTunes library saved on my NAS so all my computers in the house can access one library only and I wouldn't have to sync libraries and go through all the hassle of doing that. I have Macs and PCs in the house but the problem is whenever I access the library in a different OS than the one I used last time to access it, there is a really annoying message saying that iTunes is updating its library pops up and it takes around 10 minutes to complete. I'm wondering now if there is any way to fix this or is it just how it is.