Hyperlink button breaks some URLs when automatically undoing URL encoding
Links to Eclipse FAQs often end in encoded question marks, as the page URL is like the page title (and that is a question): http://wiki.eclipse.org/FAQ_How_do_I_support_formatting_in_my_editor%3F
If you try to add that link to a word in an answer using the hyperlink editor dialog, then the question mark gets wrongly decoded, the inserted link ends in a unencoded question mark and the link is broken as in this example (please don't fix this one by editing!).
I've already red other bug reports of similar issues, which were all closed as "by design" or "cannot be changed". In this case however, I think the algorithm could really be improved, as it leads to inserting an URL ending in a question mark, but having no URL parameters after that question mark. The algorithm should rate that as being suspicious and insert the URL as is, instead of inserting it decoded.