Have upgraded my whole site to D7 mostly because of fabulous 'Heartbeat'.
I seem to have a few errors please ..
In admin/reports/status report:
The following token types are not defined but have tokens: $info['types']['heartbeat_activity']
When the siteactivity block is enabled with all permissions set correctly:
'you are not allowed to see this activity'
I rebuilt permissions, cleared cache and then got:
You cannot serialize or unserialize PDO instances in cache_set() (line 137
Most appreciate any suggestions :)