Update error message

After updating to 6-x-1.1 from a slightly earlier dev version I receive the following error when I run my sites update.php

Warning: Call-time pass-by-reference has been deprecated in /data/disk/****/aegir/distro/003/sites/octopus.***.com/modules/uc_hosting/products/inc/uc_hosting_products.platform_feature.inc on line 18

Warning: Call-time pass-by-reference has been deprecated in /data/disk/****/aegir/distro/003/sites/octopus.***.com/modules/uc_hosting/products/inc/uc_hosting_products.site_feature.inc on line 18

The module works fine and I can't see a noticeable effect of the error but thought I should point it out here anyway.

Thanks
Gregg