I am currently using Windows, and I have ordered all my library. But when I do a back-up and I copy all these files to another computer, running Windows too, there are always some files where the metadata such as song name, track number, or album title are wrong or disappear.
Also, it happens when I run Ubuntu with other media players, so I suppose it's not Windows' fault and it happens with other operating systems even on the same machine.
So, my question is: What could I do to make the metadata permanent on all of my songs so I would not need to fix them again? Could iTunes update some kind of information other than the ID3 tags, and could this cause these mistakes in the songs' metadata?