The page http://www.japanforum.com/forum/japanese-language-help/39454-~tara-past-tense-clause.html is accessible using FireFox / IE / Safar / Opera.
However on Chron
I appears that you are trying to redirect to the correct SEO-friendly URL, e.g. if I go to test/39454-foo.html
, it redirects me to test/39454-~tara-past-tense-clause.html
.
You compare the requested URI to the expected one and redirect if they do not match.
However, there are multiple ways of writing the same URI. Some browsers may send ~
urlencoded and some may not, for example.
So you should canonicalize both URIs before comparing them.