Clear Type text not working but only in Yahoo search

Odd problem. Suddenly when doing a search in Yahoo the display font of the results is not correct. It is not clear type. Everywhere else clear type works fine. Everywhere.

I have done system restore to a point I know it was working and that did not resolve it. I have disasbled and reenabled clear type text both in Windows and in IE8.

I did do all the Windows updates on Tuesday but I can't think how one of those would effect only Yahoo Search.

I recall this happening on my old system for one user and not another and we could never resolve it. It was summized that it was a corrupt profile but I can't understand how it would only effect Yahoo.

Any ideas how I can get the Yahoo search results to have the proper font? Otherwise it's off to Google but I'd rather resolve this..

After more than a month, as mysteriously as the problem appeared the clear text on Yahoo is back to normal. I really think it was their issue.