In the old software I could view a list of posts that were liked by me or of my posts that others had liked. These views are not currently available in the "My Activity" section.
The Activity List / Activity stream will also get a MAJOR overhaul in IPB v4.1.
I will be able to create menu items (like show unread content, etc.) with that.
I also requested to include the liked posts - let's hope they'll implement that
Okay, got a reply from the manufacturer: This will be possible again with v4.1, so I will mark this as fixed, it will work fine again with the next update