Recently Updated macro showing profile: no user error

We have a strange problem with the Recently Updated macro, its not showing the profile details on hover.

But one strange thing is that on the same page the profile details are shown when i mouse over the 'updated by <NAME>' section of the page (see hover_page.png) but its giving the error when i try 'updated by <NAME>' on the Recently Updated section (see hover_recently updated.png).

Confluence: 5.0.1 (Build: 4107)
Zen Foundation: 5.2.8
Advanced Macros: 2.1.10