When sorting issues by date created (by clicking on created in the header row) the link is to:
http://bugs.traq.io/traq/tickets&order_by=created_at.asc
This is incorrect, the correct link should be:
http://bugs.traq.io/traq/tickets?order_by=created_at.asc
I've attempted to fix this, but some setups may still cause this. Make sure your server or rewrite rules don't add query strings to the URL when rewriting.
For example, this would be bad: rerouting
/some/url/heretoindex.php?url=/some/url/here.