warning: array_values() [function.array-values]: The argument should be an array in /home/web33214/domains/cirkel.org/public_htm

Drupal: 6.10
OG: 6.x-2.0-rc2

I have installed this module and when I create a sub group I receive this warning:

warning: array_values() [function.array-values]: The argument should be an array in /home/web33214/domains/example.com/public_html/sites/all/modules/og_subgroups/og_subgroups.module on line 273.