unbelievable...
i have a macbook w/ version 10.6.8, and have had BOTH airport express problems staying connected, as well as the never-ending beachball problem in every single application, including and especially safari.
today, i got the dreaded (-15006) error, found this page, turned the ivp6 to off, and voila. no more beachball. i have listened to THREE (count them!) songs in a row without any outages.
maybe if apple slowed down a little on its built-in obsolescence in the way of constant and frequent updates, we'd have a group of products that actually work together. i have a lot invested, but if they continue down this path of shoddy testing, incompatibility, and immediate obsolescence, i will definitely be choosing differently going forward. this is NOT the reputation apple used to have. disappointing.