I recently switched to 1.4alpha svn version of irrlicht and while I think I have my program working again, I ran into some problems that took me a long time to fix do to not realizing all the API changes.
For example, my custom scene nodes were still using the old prototype for getMaterialCount() that was not const, causing the count to return as 0, messing up other functions. Is there somewhere in the forums or docs that specifically list each API change that could affect the overloaded calls to custom scene nodes? This would make the process of upgrading irrlicht much easier.
Yes, I'll add this when I find enough time. There's a file in the doc folder which documents all API changes of the previous versions in detail. But this time we had a very large set of changes and we are not yet finished. But I'm already preparing the addition.