I'm having memory leak problems myself, but I'm not 100% certain that
it's a leak yet.
Here's a question for you. Are they actually leaking, or just using a
lot of memory? His log shows you the number of objects of a specific
type. For example
+50: String (29871)
+1: Hash (1128)
+1: Time (40)
-1: Proc (512)
-5: Array (1048)
This means that the number of strings since the last logging has
increased by +50 and the total number of strings are 29871.