* (bug 26781) {{PAGENAME}} and related parser functions escape their output better.
* (bug 26716) Provide link to instructions for external editor related preferences
and add a comment to the ini control file explaining what is going on.
+* Trying to upload a file with no extension or with a disallowed MIME type now gives
+ the right message instead of complaining about a MIME/extension mismatch
+* (bug 26809) Uploading files with multiple extensions where one of the extensions
+ is blacklisted now gives the proper extension in the error message.
=== API changes in 1.18 ===
* (bug 26339) Throw warning when truncating an overlarge API result