async services: problem when crontab contains other entries

[Dupuis]

Hello,
in the admin application, the "asynchronous services' generate an error if they are crontabs installed by other apps. The crontab of the user egW run as contains:

*/5 * * * * /usr/local/bin/php -qC /some_path/egroupware_v1.6/phpgwapi/cron/asyncservices.php default
12 * * * * cd ~/awstats;./update_awstats.sh

The first line is for EgW async services; the second for the weblogs analyser. The second line is the one confusing Egw. I can't add a supplemental user for having separate crontab file. Is there a way to add 'external' async services to EgW crontabs, or avoid the aforementionned error ?

Regards

Pascal