JCE editor

Has anyone seen weirdness with the template and JCE editor?
Mine turns dark after entering some text (it varies how much). And yes, there are some answers on the net if you google but those covers the default darkness of the editing box. This is white as is intended for me, but after entering text it everntually darkens.
Very weird.

Our templates doesn't change anything in backend, so its purely JCE editor problem, and we don't support 3rd party extensions.

Thanks for the reply. I understand you don't support 3rd party stuff, just giving at shot if anyone seen this before as some search results have talked about the template being a culprit.
I'll look elsewhere.

If you will find a working solution, please share it also here if you don't mind.