Hi,

I've had this same problem, but I've just removed the 'automatically perform basic compression on save' option and it seems to have stopped the black lines appearing after saving and re-opening the files. (I've only tried it twice so I'm not 100% on if it works in all situations!)

To do this, click on any picture in the document, go to the 'Format' tab click on the 'Compress Pictures' button, then click on 'Options' and deselect the 'automatically perform basic compression on save' option, then click 'OK' and then 'Cancel'... You can now try saving and re-opening the files and see if it has worked or not!

You have to do this for each document you have the problem with though!

Good Luck!

Awesome, finally a real solution.

To make it permanent, you have to edit the registry. Here's the instructions I found:

http://www.pptfaq.com/FAQ00862.htm
That page is for PowerPoint, but the same solution works for Word and Excel by following the same instructions and substituting Word and Excel when PowerPoint is referenced.

It worked without rebooting for me. I'm running Win 7 Pro 64bit. I created 32bit Dword values.