[TYPO3-english] tt_content field from extension no longer shown in 4.5

[Loek Hilgersom]

Hi,

I'm struggling with an issue after upgrading to TYPO3 4.5.x: an additional field 
added to tt_content by the extension rzcolorbox ('Colorbox slideshow') no longer 
shows up in the backend forms. In 4.4 there was no problem, I've tried a few 
different 4.5 installations (it's on 4.5.2 currently) and they all have the same 
issue; it may have something to do with the re-arranged tabs and fields in the 
tt_content backend forms.

I'm not sure if the problem is with TYPO3-core or the extension.

In the extension, the field is defined in ext_tables.php with the code below.
Is there a mistake there? (twice the loadTCA method is a bit strange, but 
probably not causing trouble, and mixing $GLOBALS[TCA] and $TCA seems a bit odd)

Or have there been changes in the way you add fields to existing tables?

Thanks for any pointers,
Loek


$tempColumns = array (
   'tx_rzcolorbox_slideshow' => array (		
		'exclude' => 1,		
		'label' => 
'LLL:EXT:rzcolorbox/locallang_db.xml:tt_content.tx_rzcolorbox_slideshow',		
		'config' => array (
			'type' => 'check',
		)
	),
);

t3lib_div::loadTCA('tt_content');
t3lib_extMgm::addTCAcolumns('tt_content',$tempColumns,1);

$GLOBALS['TCA']['tt_content']['palettes']['7']['showitem'] .= 
',tx_rzcolorbox_slideshow';

t3lib_div::loadTCA('tt_content');
$TCA['tt_content']['types']['list']['subtypes_excludelist'][$_EXTKEY.'_pi2']='layout,select_key,pages';

$TCA['tt_content']['types']['list']['subtypes_addlist'][$_EXTKEY.'_pi2']='pi_flexform';