I don't use a modem, newcomer, so I wouldn't know about that issue. However, Internet Connect received a nice little update in Panther, and I think it would likely be backward compatible. And don't worry, if it doesn't work you'll still be able to use the older version. On another topic, if you're still sitting on the fence about upgrading to Panther I would suggest it. I sat on the fence for awhile, while the major bugs were being dealt with. Even though I don't like some of the design decisions Apple has made, Panther is a great upgrade and is faster than Jaguar on my iBook 466.