HKTMXTiledMap problem with cocos2d-2.1-rc0a
Examine HellowWorldLayer.m
Code at line 68 causes the crash (adding a HKTMXTiledMap from a menu item click), the same code run during init flow (line 87 of that file) doesn't crash.
http://www.cocos2d-iphone.org/forum/topic/17945/page/9#post-378053