TYPO3 Core

I get the following error in the install tool (Look additional information field).
I was trying to install new system extensions like recycler. Actually the update seems to work, as the selected extensions are installed. Only the result page didn't show up.

I assume the 'result'-page is trying to implode something that is not an array. Should be a no brainer, as the update works ;)

Core: Exception handler (WEB): Uncaught TYPO3 Exception: #1: PHP Warning: implode() [<a href='function.implode'>function.implode</a>]: Invalid arguments passed in /html/typo3/typo3_src-4.4.4/typo3/sysext/install/mod/class.tx_install.php line 6623 | t3lib_error_Exception thrown in file /html/typo3/typo3_src-4.4.4/t3lib/error/class.t3lib_error_errorhandler.php in line 106
09:29:54 . . Sys! . Core: Exception handler (WEB): Uncaught TYPO3 Exception: #1: PHP Warning: implode() [<a href='function.implode'>function.implode</a>]: Invalid arguments passed in /html/typo3/typo3_src-4.4.4/typo3/sysext/install/mod/class.tx_install.php line 6623 | t3lib_error_Exception thrown in file /html/typo3/typo3_src-4.4.4/t3lib/error/class.t3lib_error_errorhandler.php in line 106
(issue imported from #M16523)