I signed up for iTunes Match this morning. It went flawlessly through the first 2 steps then began the process of uploading about 2500 unmatched tracks. The last time I looked it was at about 1200. Then I went to run some errands and came back with an error saying iTunes had to close or something. When I restarted iTunes it gave me some prompt saying iTunes Match had encountered a problem and that I would have to sign out and sign back in from the iTunes Store. I did this and now when I go back into my library I can't tell if its still working. The Match button from on top of iTunes is gone now. Does this mean all my stuff uploaded? I'd there any way to tell?