Linux, Konqueror, and and Mozilla

I decided one day to try mozilla out. So I made it my default browser. A few days later I decided that I didn't like it because it is SOOOOO slowand it seems to make the rest of my system that way so I put konqueror back into that position. Now when I go to a web page it tells me that I associated Konqueror with text/html but that it can't handle that. Does anyone know how I can fix that?

I think that if I reinstall konqueror on my system thait might fix it but I don't know how to do that. If someone could walk me through the steps I would be most grateful.

I have installed debian on my system from knoppix.

Thanks,
Mike