I don't know what is happening to yahoo, but they display something really wrong in the title of my website, hosted by another company (not related to yahoo). And have a look to this one Have you ever had that on your website result? This is the screenshot images took today in the US and French Yahoo!
about 3 years ago I had a very similar situation where Y had all across my listing wrong titles and often damaged link-code or a plain link text ( url ) instead of title needless to say that my pages where validate html 4.01 ( your site has code errors but none that would explain the error. I then reported the situation to Y since all across my listing the results where wrong - just as it would appear after a database damage / emergency recovery from alternate temporary source .... I recommended ALL results to be removed and all re-created from scratch Y did HALF of my recommendation - removed all but some 1000 listings I reported again - since the remaining nearly 1000 still were wrong listings as a result I got banned / all listings removed - until now! no problem to me - the loss of traffic is so tiny that I never really noticed a loss of traffic it's just annoying my recommendation live with wrong results - never expect Y to understand the wrong situation who knows in a few weeks - months - years Y may go bankruptcy and just disappear from SE world ... G brings the $-traffic Y is just for fun to add (red) color to SE world
Thanks for sharing your similar experience. The hosting where I am, get a crashdown on their server more than one month ago,maybe it's because of that. They reported a spam issue. anyway now, my PR is 0 and was 3 before, most of the old pages in Google are not shown anymore. And my pages seems valid, anyway since the begining.