There's different types of id3 tags and different versions of them. Unfortunately iTunes reading of id3 tags is limited to 2.2 I think from memory off-hand. iTunes also has its own extra method of describing files different to other audio programs. What you can do is copy the information and use it to describe the file. ie: in Library window, select the file and choose Describe button.

Other than that, use a separate id3 tagger and make sure it's tagged in both types of id3 and lower the tag version.

But no simple answer otherwise.