Flex :: Track Down Memory Leaks In The Application?

I've been trying to track down memory leaks in our application, and keep finding myself back looking at Spark components as the culprit.

Many classes in Spark use RichEditableText for displaying their text properties (ComboBox,TextInput).RichEditableText has a local textContainerManager property, and frequently calls compose() on this.Here's the relevant abridged extract from TextContainerManager

// Line 282 - 292:
static private var stringFactoryDictionary:Dictionary = new Dictionary(true);
static private function inputManagerStringFactory(config:IConfiguration):StringTextLineFactory
{

[code]...

Line 1242 is the crucial line here, as it gives the static dictionary a reference to our component.(Note - I've checked this with the debugger to confirm which branch of the ternary gets executed.) This would prevent the instance from ever being garbage collected.

Eg: Static dictionary has a value with a reference to the instance -- instance cannot be GC'd.In turn, this would prevent any other instances which have a reference to the instance of TextContainerManager from being GC'd also.While this theory certainly matches what I'm seeing in our app, I can't beleive that there really is a memory leak in such a low-level spark component.