I am watching the last episode of DS9 right now, and I realized that when the Federation ships were leaving DS9 for the battle, the Enterprise-D was sitting right in the middle of the fleet.
At that point the Enterprise-D had been destroyed and the Enterprise-E had replaced it. Was this just a mistake on the part of the CGI crew, or was it actually the Enterprise-D?
The image that I am taking about is exactly 6 minutes into the episode "What You Leave Behind".
I also remember seeing the Enterprise-D in other DS9 space battles, but this is the only one that I can cite right now.