Yes, copy just the problem line to the clipboard & paste it to a new page. Using Graham & Anders solutions, If you breakShapes, then select all you'll notice that it's 3 lines. Only the Cats head can be seen but you can see the selection blobs around the other lines. They both appear to be lines of zero length. Even if you apply a 999Pt line width to them you can't see them. I also confirm that Anders workaround does the trick.

Egg