We have experienced a strange problem in InDesign CS6.
We have placed an image using anchored frame within Table Cell. Unfortunately, the image is not visible and hidden within table cell. It doesn't reflects in InDesign preflight indicator, however it is showed in links palette as "OV".
Herewith I have attached the screen shot for your reference.
Thanks in advance,
Select the text frame and choose Edit > Edit in Story Editor. In the Story Editor, you can cut the image from the table and resize it to fit.
Is your preflight profile set to detect overset text?