RTF: Max Text Size???

Is there a max text size to TRichEdit??? I was under the impression that
there was no max size but:

  Drop an RTF control on a new form and using the LoadFromFile method, load a 1M
  text file. The entire file loads but you cannot edit the text unless you delete
  some first.

  In a large program I'm working on, the RTF won't take over a 60k document
  without experiencing this behaviour.

Could this be related somehow to the size of resource pools in Windows?