When you use Check spelling it removes html tags like <html> from the preview. But if you if you do a preview after the spelling they are back. Not a big problem and maybe it messes up the spellcheck if you have them there.
I am talking about the perl-version, not php. php doesn´t have a spell-check.
The html tags are stripped out when doing the spellcheck because it will cause some problems with this function.
What's the reason for not implementing spell checking for the PHP-version?
The functions used for the PERL version of the spell check are not available in PHP and without them I'm not sure of an efficient way to write one.
I asked a friend and he found this links
http://www.alt-php-faq.org/local/59
http://www.zend.com/zend/spotlight/spellchecking.php
Thanks for the links. These look promising.