Token flagging_user is filled with stream owner instead of acting user.

Hi,

The bug appears when I generate an activity message on event "A facebook_status has been flagged", and then view it from another user through a view of the stream.

Tokens [flagging_user:xxx] and variable $flagging_user are filled with the stream owner, instead of the acting user.

I spent looooots of hours digging through google and projects' issue pages, and I couldn't find any useful help. Also looked up manually through code, and no result.
I tried changing the "Acting user" using tokens, enabling/disabling the cache: all same results.

Activity records are targetting: Acting user, Members of the active group, and Administrators of the active group.
Everyone can see the message.

Other modules in use:
Facebook-style 6.x-3.1 + submodule Facebook-style Statuses Activity/Flags 6.x-3.1
Activity Log 6.x-2.0-beta1
Activity 6.x-2.0-alpha1
Flag 6.x-2.1
Flag actions 6.x-2.1
Views 6.x-2.12

Activity Log Digests is disabled, I'm just rendering from a custom view (similar to the default activity_log one)
The default language is Spanish.

Hope someone can help, thanks in advance!

Note: could be a follow up of forum topic http://drupal.org/node/1827074 from October 30, 2012.