Today, I released Irrlicht 0.6. The new SDK can be downloaded from the download page. You might consider upgrading to the new version, if you need something from this list:

• Improved .X file reader. Now loads, displays and animates 99% of all .x files it was tested with.
• Integrated XML parser and writer. Reads UTF-16 as well as ASCII text, and directly out of compressed .zip files if needed.
• Lots of new GUI widgets like ComboBoxes, ToolBars, PushButtons and ImageButtons.
• A new tutorial which shows how to create a complete mesh viewer application.
• Resizeable rendering window.
• Full Filesystem support in Linux. (as well as some other bug fixes for this OS)
• Lots of small additions and bug fixes.

A detailed description of all changes can be read in changes.txt. I also uploaded the new tutorial to this webpage, where it can be read online.