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Another one about special chars in URLs.

Easy reproducing steps:

  1. Go to the C# tag page
  2. Log in if you're logged out or log out if you're logged in.
  3. You're now returned to the C tag page

Gets worse, for example, when coming from a "answers:1" kind of search result page.

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Marking this completed, for now, but it's only partially complete.

I fixed the more common return URL errors.

One pernicious problem is that certain tags in URLs need to be double encoded, and the ReturnUrl() function has to somehow figure that out.

So, for now, we're bailing on that part of it. If you log in or out on a search containing a tag with a character that is sketchy in URLs like [c#] or [c++] it may not quite work right.

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I have the same issue:

  1. Log out
  2. Go to
  3. Log in
  4. The % characters are escaped and you're taken to:
    which is not valid.
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