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See description at PukiWiki-official
-http://pukiwiki.osdn.jp/?PukiWiki/Download
+https://pukiwiki.osdn.jp/?PukiWiki/Download
INCOMPATIBILITY INFORMATION BETWEEN RELEASES
============================================
+PukiWiki 1.5.2: Incompatibility from PukiWiki 1.5.1
+
+ 1. CSS file "skin/pukiwiki.css.php" has been renamed to "skin/pukiwiki.css".
+ (See BugTrack/2448, BugTrack/2367)
+
+
PukiWiki 1.5.1: Incompatibility from PukiWiki 1.5.0
- 1. TrackBack implimentation and 'referer' function had been removed.
- (See BugTrack2/62)
+ 1. Default authentication method from AUTH_TYPE_BASIC to
+ AUTY_TYPE_FORM.
+ (See PukiWiki/Authentication)
PukiWiki 1.5.0: Incompatibility from PukiWiki 1.4.7_notb