A platform problem, the error is ONLY on Mac OS X: Safari or Firefox: On either browser the "Add my comment" button produces the (incorrect) error "Error: please fill the required fields (name, email)."
IE 5.2 Mac and IE6/PC work fine.
This error has been seen since at least the WP1.5 Feb 06 nightly. I've just not reported until I had done the 1.5Final upgrade
Any workarounds or suggestions much appreciated.