A minor one. When you for the first time go to the configuration and click on edit you get an error:
ADODB.Field (0x800A0BCD) Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record. /forum/admin_config_groupcats.asp, line 598
Haven't ever seen that error myself though I'm not a heavy user of groupcats. I'm puzzled a little though by the statements of the two of you that have seen the error, I read the first as saying it only happens the first time you go to edit them but the last response indicates it happens more frequently than that.