It goes back to the problem of being unable to have a namespace and interwiki prefix of the same name :)

If you type [[Wikipedia:Attribution]] into Wikibooks, it doesn't know whether you want to go to the IW url (which it assumes is the case, and follows it) or a local title of the same name.

For kicks, it might be entertaining to try and make a namespace the same as an IW prefix to see how they barf while coexisting...

mike.lifeguard+bugs wrote:

(In reply to comment #1)
[...]

For kicks, it might be entertaining to try and make a namespace the same as an
IW prefix to see how they barf while coexisting...

I did that when first setting up my localhost wiki. It wasn't pretty. I don't know whether it's worth looking at "fixing" that kind of stuff, since that's an ill-advised thing to do anyways. Might be considered a misconfiguration rather than a software bug.

(In reply to comment #2)

(In reply to comment #1)
[...]

For kicks, it might be entertaining to try and make a namespace the same as an
IW prefix to see how they barf while coexisting...

I did that when first setting up my localhost wiki. It wasn't pretty. I don't
know whether it's worth looking at "fixing" that kind of stuff, since that's an
ill-advised thing to do anyways. Might be considered a misconfiguration rather
than a software bug.

I'd be inclined to call it a misc configuration too. If you have two identical namespaces, the software could not be expected to know which one you're referring to. Case in point:

Wikipedia:Attribution. Now, is the Wikipedia: a local namespace or an interwiki prefix? The software can't know :) Perhaps making it default local (if exists) then go to the IW url, but I'm not even sure that's worth fixing either.

• This bug has been marked as a duplicate of bug 11344 ***