Simple Access and Acidfree conflicting

When trying to mass import-upload zipped files on an album on Acidfree the operation stops with the following error :

Location http://www.xxx.com/node/1441/import
Referrer http://www.xxx.com/node/1441/import
Message array_filter() [function.array-filter]: The first argument should be an array in /home/xxx/public_html/sites/all/modules/simple_access/simple_access.module on line 219.
Severity error
Any feedback on this?