We upgraded PHP to version 5.3.6 a couple days ago, and today discovered that several sites we built using the Hierarchical Pages plugin failed catastrophically - the entire site goes blank!
My error logs tell me that, among other things, I've got an "unexpected $end" at hierpage.php on the last line. I tried removing the extra carriage return after the ?> and then tried removing the ?> as well, but neither of those fixed the problem.
I've pulled the plugin temporarily, replacing it with the far more pedestrian Pages widget. Any hope of a fix REAL SOON?