based on the way Yahoo acts, I believe when you log on, it looks at your browser, and configures itself for that browser. I learned this with firefox identified as IE 6.0, and it barely worked at all. As soon as I logged off, and changed agent switcher back to firefox, it worked fine when I logged on again.

So, yes, it seems likely they changed code for whatever they identify Konqueror as.

If you have room for firefox, that is highly recommended. 1.5 is out now.