I was posting an answer to a Java question and I noticed that all the links containing a space don't work. For example http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html#replaceFirst(java.lang.String, java.lang.String) or if you try to use the button : [replaceFirst][1]
I know I can escape the faulty characters, but it will maybe be a good idea that this will be done automatically when inserting a link with the button. And I doubt all users of none-programming related StackExchange site knows about character escaping.
[1]: http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html#replaceFirst(java.lang.String, java.lang.String)