[TYPO3-dev] TYPO3 4.3.0alpha1. Function isClassAvailable (in class.tslib_content.php) gives error with some extensions

[Erik Svendsen]

Error message:
Catchable fatal error: Argument 2 passed to tslib_cObj::isClassAvailable() 
must be an array, null given, called in /var/www/html/typo3_src-4.3.0alpha1/typo3/sysext/cms/tslib/class.tslib_content.php 
on line 5988 and defined in /var/www/html/typo3_src-4.3.0alpha1/typo3/sysext/cms/tslib/class.tslib_content.php 
on line 6416

Tried extensions:
* Perfectlightbox
* Multibox

Probably more extensions.

The problem is probably in the extensions, but should be solved in some way. 
Haven't made any bugreport yet, because:
* The planned autoloader may solve the problem
* Should it be solved in core or in the extensions.

WBR,
Erik Svendsen
www.linnearad.no