Apple already announced that MobileMe is not compatible with IE6.
When I dug into MobileMe’s source of the login page, I found this – for me a bit surprising – chunk of text:
Internet Explorer 7 is not fully supported
Internet Explorer 7 has known compatibility issues with modern web standards which affect Web 2.0 applications such as MobileMe.
You can use Internet Explorer 7, but you will not have access to all MobileMe features and will experience slower performance.
For the best MobileMe experience, please use Firefox 3 or Safari 3
Either Apple had time problems making things also work perfectly for IE7 or they really want to get users switching over
to a real browser.
Meh, my guess is that they simply didn’t want to bother. Let’s face it – IE6/7 are a collosial pain to develop for and Apple is doing every web developer a service by dissing those.
When I’m grown up, I’ll do that, too. :o)