Thanks, do you know if this issue is limited to the 2008 version or does it happen in 2009 and 2010 as well?
Not sure of earlier versions but haven't seen the problem yet in SW2009.
I GOT IT. I've been having this problem for months. I am using 2008 and keep losing my BMP every time I closed the drawing.
Here's the fix.
Open drawing template. slddot
Click edit sheet format
Click on and delete current logo. you will notice there are no handles on the image when clicked.
Click Create from file>Browes and find your logo file. Click OK
Place the image where you want and click Edit sheet
Now click file>Save sheet format.
I originally used insert image to load these in. I guess that is where the bug is.