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I recently experienced problems with some urls. If a website has ‘–‘ (2x minus sign) in url, it doesn’t pass some url validators, for example it’s impossible to submit it to website catalog or even twitter: http://twitter.com/share?text=test&url=http://test–test.com
(link with one minus sign )
Why do those validators don’t let urls with ‘–‘ pass? Is this a bug, or a feature?
edit: I can add that that kind of links works with google.
Most validation algorithms don’t follow RFC’s for web URL’s (and often other things like email addresses) for a variety of reasons. Some of the reasons could be:
It should be noted that this will become even more of an issue as more international domain names are being used (with characters other than standard ASCII).