[TYPO3-workflow] Not able to preview image(s) in workspace inserted to a Text w/Image content element and DAM

[Sebastian Fritzsche]

I am working with
  TYPO3 4.2.6,
  dam 1.0.14,
dam tt_content 1.0.2

I am not able to preview image(s) in a user workspace inserted to a Text 
w/Image content element., Only when it is published the images can be 
previewed. Can anybody help or did anybody discover this proplem, too?