System Information
Linux64, 16gb ram 2*gtx 560ti oc

Blender Version
Broken: All I've tried

Short description of error
The renderer gets another frame to render than what is displayed in the viewport.

Exact steps for others to reproduce the error
I've attached a blend file to illustrate the problem.

First I created a scene from frame 1 to 1200, baked the rigid body sim and inserted the scene in the vse. Then I applied a cam selector and switched the camera at certain frames. All worked well.
When I now increase the scene start value to (f.e.) 125 and the end value to (f.e.) 423, all seems to work well - until I render the scene. Because then, the scene start frame is added to the point cache and delivers an offsetted image to the renderer. Even worse is that it's not communicated to the user that the scene length in the vse actually changed. You can only see that if you're changing the trim duration (hard) at one of the scenes...

As a user, I would like to render out the scene exactly as I see it in the viewport...so I would consider that as a bug.

Thanks to Sergej Reich for investigating the issue partly..

Greetings, Thomas