I just thought I'd share a helpful development note with all that are interested.
If you have not used the ASP.Net AJAX Tab control yet you should. It integrates quite nicely into Visual Studio and is not complicated at all. However I found a flaw when using it in my Knowledge Base module inside DNN.

This is not what we want. I have to thank Vladan Strigo at the DNN Forums for his solution. Check out the full post
here.
Just add in a little css fix to ensure the tabs display properly.
.ajax__tab_xp .ajax__tab_tab {height: 21px;}
< font>
Now that gives us the desired output.
