Delete button no longer works in IE E-Mail, works fine with Mozilla?

I seldom use IE for Yahoo E-Mail, I use Mozilla. However yesterday I upgraded IE to version 7.0. Since then when signing onto Yahoo E-Mail this web address would be in the tool bar: https://login.yahoo.com/config/mail?.int... with a notice saying:

'If you are seeing this page, your browser settings prevent you from automatically redirecting to a new URL.

Please click here to continue.'

This never occurs with Mozilla. After pressing 'click here' in IE the mail page comes up, but the delete button for E-Mail; the 'check all' button for bulk mail; and the submit button for submitting a question no longer responded. I uninstalled and deleted IE 7.0, but problem persists in the previous version of IE, which did not have this problem before. These buttons work fine with Mozilla. Is there a way to contact Yahoo via E-Mail about this?

Delete button no longer works in IE E-Mail, works fine with Mozilla?microsoft office

Why bother at all with putting band-aids on to repair IE? Just delete it and stick with Mozilla.