I\'ve noticed in the following post that you can get a stack trace out of FastMM to show what appears to be where an object was allocated:
How to track down tricky m
In addition, Francois Gaillard presented on CodeRage II a session called Fighting Memory Leaks for Dummies and deals specifically with FastMM. It is listed under the CodeRage II replays at thursday, November 29, 2007, 9.45am - 10:45am.
http://edn.embarcadero.com/article/37498
Regards, Erwin