I know Alaundo's intending on checking up [and correcting] a lot of the older link errors, so it's likely this one is already on his list.
We appreciate the catch, though, Eric. Sometimes we miss this stuff.
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I'll note, also, that while the content isn't easily accessible from the Wizards.com site, it can still be found using the Wayback Machine, or even with just a very specifically worded Google search.
Aye, we once had all the online content replicated at Candlekeep but this was later halted and the index removed. The old pages do still exist, however (as you have found), but will be removed in due course.