If one question title includes %, using URL structure:
/123/why-do-birds-sing (requires htaccess file)
would introduce some display problem.
I guess the problem comes from .htaccess file, because % has special meaning in .htaccess.
How should I do to solve this problem?
It seems no such problem in this site (question2answer.org) has no such problem. Can someone gives me an example of .htaccess?