Blank page when editiing wiki pages
I've got a bit of an odd problem with one of my tikiwiki installs
I'm very certain the problem is with my setup but haven't a clue where.
I'm running 1.9rc3, though the problem has been around since 1.8, everything seems to be ok except my ability to edit wiki pages,
I have managed to edit a few pages previously but if I try to edit them or create a new page I just get a blank page returned, not even a <html> tag just nothing at all. If I don't have permission to edit the page that returns the correct error message.
It's RedHat linux advanced server 3
mysql 4.0.20
PHP 5.0.0
Apache 2.0.46
anyone else come across tis, or got any ideas on how to debug/fix it?
annoyingly it's the only thing that isn't working.