I noticed that when I generate a checkboxsetfield it creates invalid html.

The problem seems to be that an UL is put IN a SPAN, which is not allowed.
Any ways to get rid of this span element in there, or change it to a div maybe?

(without having to change a lot of core code?)

Besides that I'm looking for a way to group certain fields in the form

I would have blocks with 'user details', 'topic categories', 'topic details', and 'topic map' all in one form. I know I can put a headerField to it, but I need a way to group these in a div or even a different fieldset, which would allow me to do more with css.

If anyone's still alive here, let me know.

Or, what will I break in the cms when I strip <span class="middleColumn"> from DefaultFieldHolder.ss?

Forget about that.. that doesn't seem to be the place to change it...

So, grouping certain input fields in a extra div or having separate fieldsets is impossible I presume?

Looks like I found something that might work: CompositeField.

http://doc.silverstripe.com/doku.php?id=compositefield

However this seems to be a bit over the top... it creates more divs than necessary.

$fieldgroup = new CompositeField(	new HeaderField("Details Auteur", 3),
							new TextField("FirstName", "Voornaam", $member->FirstName),
							new TextField("Surname", "Achternaam", $member->Surname),
							new EmailField("Email", "Email", $member->Email)
							);
$leftfield->setColumnCount(1);

This gives me a wrapper div <div class="field CompositeField nolabel multicolumn">
AND a new div per field:either <div class="column1"> or <div class="column1 lastcolumn"> .

I certainly don't need those extra divs. I only want the wrapper...

Great idea! One for the opening div and one for the closing..

Thanks!