[TYPO3-mvc] Exception while property mapping at property path

[Georg Ringer]

Hi,

I just fetched current master and got an error in my single view of 
extbase extension
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#1297759968: Exception while property mapping at property path "":Object 
with identity "4" not found.
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The URL is
-----------
URL:
http://localhost/currenttrunk/index.php?id=40&tx_news_pi1[controller]=News&tx_news_pi1[action]=detail&tx_news_pi1[news]=4&cHash=9ad7f3dd36f9946fafae2b263f3a0672
-----------

I didn't change anything in my extension and single view is pretty 
forward and simple.

Anyone got an idea?
thx, Georg