we have just made the irrlicht SVN branch the new trunk

If you have the current svn irrlicht branch checked out, you have to switch to trunk:
- {l Code}: {l Select All Code}
svn switch http://supertuxkart.svn.sourceforge.net/svnroot/supertuxkart/main/trunk .
Developers with write access obviously use
- {l Code}: {l Select All Code}
https://USERID@supertuxkart.svn.../
Check your current .svn/entries if you are not sure.
For people still on the old trunk: be aware that you now need irrlicht 1.6 installed, and that (if irrlicht isn't in a default system location) you have to run configure with --with-irrlicht=<path-to-irrlicht>. And be aware that the irrlicht version is not stable

Let us know if you have any problems.
Cheers,
Joerg