Roundcube logs a lot of 'PHP deprecated' messages

[Brezhonneg]

I Installed roundcube (0.5.3+dfsg-1) on oneiric.

Roundcube logs two errors for each and every page load or ajax call. At the end of the day, this makes a huge log... I get the error messages in syslog:

roundcube: PHP Deprecated: Assigning the return value of new by reference is deprecated in /usr/share/php/MDB2.php on line 393
roundcube: PHP Deprecated: Assigning the return value of new by reference is deprecated in /usr/share/php/MDB2.php on line 2647

In my case, the only problem is that it logs a lot of errors, but a very similar bug was reported on debian with more serious issues:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=571702

Apparently, the problem would be fixed by upgrading the php-mdb2 package (2.5.0b2-1 in the repository at the moment) to 2.5.0b3 available upstream.

Roundcube is served by apache2 on my server. Note that I have 'error_reporting = E_ALL & ~E_DEPRECATED' in /etc/php5/apache2/php.ini but that does not seem to be of any help.

[Brezhonneg (fricompte)]

I still get the same problem with roundcube 0.5.4+dfsg-1

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Andreas Ufert (andreas.ufert)]

Same problem here:

[Wed Aug 08 17:41:48 2012] [error] [client x.x.x.x] PHP Deprecated: Assigning the return value of new by reference is deprecated in /usr/share/php/MDB2.php on line 393
[Wed Aug 08 17:41:48 2012] [error] [client x.x.x.x] PHP Deprecated: Assigning the return value of new by reference is deprecated in /usr/share/php/MDB2.php on line 2647

precise (12.04), x86_64

$ dpkg -l | grep roundcube
ii roundcube 0.7.1-2 skinnable AJAX based webmail solution for IMAP servers - metapackage
ii roundcube-core 0.7.1-2 skinnable AJAX based webmail solution for IMAP servers
ii roundcube-pgsql 0.7.1-2 metapackage providing PostgreSQL dependencies for RoundCube

$ dpkg -l | grep php-mdb2
ii php-mdb2 2.5.0b2-1 PHP PEAR module to provide a common API for supported RDBMS
ii php-mdb2-driver-pgsql 1.5.0b2-1 PHP PEAR module to provide a PostgreSQL driver for MDB2

[Marcin Juszkiewicz (hrw)]

Backport of php-mdb2 from quantal to precise would solve bug.

[Dmitry A. Zhiglov (dmitry-zhiglov)]

2 arcin Juszkiewicz (hrw): How to do backport on precise from quantal?