squeeze dist-upgrade of 11/29/2010 broke typo3 installation

[Geronimo <geronimo013@arcor.de>]

Hello,

with the dist-upgrade of yesterday (11/29/2010) my typo3 installations don't 
work any more.

Error from syslog is: 
PHP Warning:  Unknown: open_basedir restriction in effect. 
File(/usr/local/share/typo3_src+dummy-4.4.4/index.php) is not within the 
allowed path(s): (...:/usr/local/share/typo3_src+dummy-4.4.4/:...) in Unknown 
on line 0

so apparently the open_basedir does not respekt the directory whitelist.

I did some tests resulting in a failed stat of an existing file. That file has 
the apache-user as owner.

I use typo3 with several virtual hosts and different installations, which all 
worked fine until the 11/28/2010.

So any hint or workaround is appreciated.

kind regards

Geronimo