[TYPO3-project-4-3] XCLASS, my problem or bug?

[falcifer]

Hello

i've tried this in my ext_localconf.php

$TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_db.php']= 
t3lib_extMgm::extPath($_EXTKEY) . 'lib/class.ux_t3lib_db.php';

previously i have  XCLASSed t3lib_db in TYPO3 4.2  but now in TYPO3 4.3 
doesnt work

I saw that the code of t3lib_div::makeInstance has changed

Is it all ok?, could anyone verify it XCLASSing t3lib_db?

Thanks