First one is completely normal. It's a problem in every engine with shadow mapping tech. Can be adjusted by adjusting the shadow depth bias. Personally I'd just use a texture that's not solid colour to hide the artifacts.
Thank you so much. Doesn't solve my issue, but putting at 8192 made it at least not noticeable, anything lower was, I want to find the root problem though. Never had it untill it was in a visarea.
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Is that somehow related to the second problem at all?
yes,but it works fine for me, thats weird
Edit: like first person said, shadow Bias:
http://www.crydev.net/viewtopic.php?p=994615#p994615