Try disabling all add-ons and see if you can sign in.
Using IE6, Tools>Internet Options>Programs Tab>Manage Add-Ons Button
Using IE7, Right click on the IE desktop icon and select Start Without Add-ons
Have you recently added software updates?

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Gistcheckin
> My myyahoo home page sign in page keeps regenerating over and over not
> allowing me to sign in. I uninstalled IE 7.0 which left IE 6.0 and it still
> does it. It workd fine on Firefox so it is not the webpage. Any suggestions
> please?
DEANO - 24 Jun 2007 22:16 GMT
Yes I have software that updates all the time. I did a restore to 3 days ago
and now I don't have the problem. I still don't know what caused it though.
Thanks for your help!
> Try disabling all add-ons and see if you can sign in.
> Using IE6, Tools>Internet Options>Programs Tab>Manage Add-Ons Button
[quoted text clipped - 7 lines]
> > does it. It workd fine on Firefox so it is not the webpage. Any suggestions
> > please?
Gistcheckin - 24 Jun 2007 22:53 GMT
You're welcome and thanks for the feedback.

Signature
Gistcheckin
> Yes I have software that updates all the time. I did a restore to 3 days ago
> and now I don't have the problem. I still don't know what caused it though.
[quoted text clipped - 11 lines]
> > > does it. It workd fine on Firefox so it is not the webpage. Any suggestions
> > > please?