Several memory leaks have been fixed. This means that unloading a level should now give back nearly all allocated resources
New debugging graph tool to help debug leaks
It is now possible to assign names to lightmap caches so that when the level is reloaded later the lightmap cache is still valid. This assigning of name is not yet automatic though. This is a todo for next release
There is a new tutorial application (no tutorial documentation for this yet) on collision detection and hierarchical objects
Several parts of the documentation have been updated. There is now documentation on the terrain engine and no the thing mesh object. The map format doc has been updated but is still not fully up-to-date
Added a new 'Documentation Guide' section which helps the CS beginner to browse the documentation more effectively
There have been several minor API changes. Most will not affect you but some will. There is a new appendix explaining what has changed in the API between 0.90 and 0.92
Several smaller new features like the ability to sort a render priority (for example, the alpha render priority will now sort objects back to front). Also added the ability to specify orientation in the START keyword
Fixed a very bad bug in the collision detection plugin
There have also been some global optimizations on some core classes like csMatrix3 and csReversibleTransform. Since these classes are used a lot this should give a small but noticable benefit.