Last modified: 2009-09-03 09:24:42 UTC
Consider what happens when you click http://en.wikipedia.org/wiki/Wikipedia:Wikipedia_Signpost/ It's just a trailing slash different from http://en.wikipedia.org/wiki/Wikipedia:Wikipedia_Signpost/ But the best you can do is try to get there from deep from within the offered http://en.wikipedia.org/wiki/Special:Search/Wikipedia_Signpost/ Therefore perhaps say in a link "did you mean [this without the trailing slash]?"
"Foo" and "Foo/" are different titles, and should not be treated as equivalent. It's possible to change the message for Wikipedia, but this is a local issue, and not a MediaWiki bug.
*** This bug has been marked as a duplicate of bug 3368 ***