iTunes Match keeps forcing me to re-add all my computers
At least once every two weeks my iMac (and my Windows machine at work) tell me that I must sign out and then back into my iTunes acccount to fix a problem with iTunes Matchb. After doing so I am forced to "add this computer" and go through the whole scanning process (which can take an hour or so with my library). This has happened 10 or so times on each machine throuigh multiple versions of iTunes and is very irritating.
Anybody know what I can do to stop this from happening?
iMac, Mac OS X (10.7.2), 27" 3.06 Ghz Core 2 Duo, 8 GB RAM