Moodle installation worked as usual, but uploaded files with Unicode characters in filename became unaccessible (both files uploaded before and after migration). Debugging lead us to discovery that for pluginfile.php filename looked like "%AA%BB" instead of Unicode characters. We also noticed there was no __SERVER['PATH_INFO'] set.
The question is - should we report this as a bug on the tracker. And is there a way to supply __SERVER['PATH_INFO'] to PHP via FastCGI?