hi i dont know about mac computers but i had this same problem searched all over for answers and noneof them worked tonight did 2 things 1. dowloaded safari 4 and 2. reset internet explorer settings to default
yeah my itunes store back again i'd try resetting internet explorer first hope this helps i dont think it was safari cos that didnt work b4 i reset internet explorer to default
If you are unable to connect to the store, and you have tried the official fixes...
Ensure ITunes is off...
Search for a file called itunesPrefs.xml
Delete this file (I had two copies)
Restart ITunes
Negotiate through some requests
Try connecting to the store
This process forces ITunes to reestablish its connections, the folder is not damaged.