* New hook ArticlePrepareTextForEdit added, called when preparing text to be saved.
* New parser option PreSaveTransform added, allows the pre-save transformation
to be selectively disabled.
+* Alternative to $wgHooks implemented, using the new Hooks class.
=== Bug fixes in 1.18 ===
* (bug 23119) WikiError class and subclasses are now marked as deprecated
members.
* (bug 2585) Image pages should send 404 if no image, no shared image and no
description page.
+* (bug 12974) The behaviour of wikitable and template parsing was altered. Previously,
+ all templates were treated as being at the start of a block context for the purposes
+ of evaluating wikitext elements like #, :, *, and tables (bug 529). Now this
+ behaviour is only applied to wikitable-start {|, but the first line of a wikitable
+ cell is now treated as a linestart.
+* Custom editintro's using the editintro url parameter will no longer show <noinclude>
+ sections on pages they are included on.
+* (bug 26449) Keep underlines from headings outside of tables and thumbs by
+ adding overflow:hidden to h1,h2,h3,h4,h5,h6 (also fixes editsection bunching).
+* (bug 26708) Remove background-color:white from tables in Monobook and Vector.
+* (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