The Flash Builder 4 Profiler doesn't show back references in AIR.
Loitering Objects display contains entries for UIComponents that when double-clicked will list as having (0 Paths). If the UIComponents has referenced by keys of a weak keyed Dictionary, then the objects list as having "(1 Paths)".
When there is a space in the main application file for AIR projects, requests don't show up correctly.
For more information, see bug FB-25184.