I found a solution in this thread:
www.bestofjoomla.com/component/option,co...w/catid,76/id,48952/
As Araband mentioned it:
The fix:
Execute this command in linux
Code:
find components/com_fireboard/ -type f|xargs sed -i 's/aro_group->group_id/aro_group->id/'
That will replace all occurences of "aro_group->group_id" with "aro_group->id"
I did this on my site and all my users started seeing the forums that they had access to again.
NOTE: This fix should only be used if you are using Joomla 1.5.x!
But I don't understand that command and don't know how to run it on a shared host.
