IE8 - Lots of problems

Is anyone else having a lot of problems with Internet Explorer 8 like I am? Basically a lot of forms aren't working because it seems like some ways to access the DOM or document object model have somehow changed. These same sites work in IE 7 and also Firefox so not sure why they don't work in IE 8. I cannot believe these changes are not affecting other web sites as the programming is very common. Nothing obscure or tricky going on in these web sites - just getting values out of fields via the document object model. What's up with these changes?