ie6, tabbing and website navigation design

Using ie6 tabbing in ie6 seems very chaotic, please try:

tabbing at the wai homepage: http://www.w3.org/WAI/ it is very hard to
navigate.
Tab to an anchor link, press enter, and tab again. not what one would
expect.
a similar problem is here:
http://www.learningdifficulty.org/develop/w3c-scripts.html
I don't know whether this is an insoluble problem, however I'm finding it
very frustrating.

Anybody have any ideas, the navigation works fine in lynx for instance?
Is it a bug, or perhaps I need to adjust some setting?

jonathan chetwynd
IT teacher (LDD)
j.chetwynd@btinternet.com
http://www.peepo.com         "The first and still the best picture directory
on the web"