Hi,
After updating from the 3.0 beta, I started getting the "String was not recognized as a valid DateTime" error when compiling for the xbox, which I solved by deleting the bin and obj directories. Now, it compiles, deploys, the xbox displayes the deploy complete message, and then goes right back to "waiting for computer connection". Then, even though I've set my target as the xbox and the xbox recieved the binary, it opens the PC version on the computer. If I exit xna game studio connect and go back to my games, the build is there (I deleted it before just to be sure, this is the new one). If I start that game, it will open fine and reach the main menu. If I start a new game, it will exit with a code 4. On the PC on the other hand, there is no problem at all and you can play for how ever long you want. I haven't added any platform specific code since my last xbox version (switched to pc when the 3.0 beta came out) so I don't see how or why it's failing now.
Anybody have any clues??

Thanks in advance

This sounds like item 1.2.1 in the XNA Game Studio 3.0 readme. Please let us know if you are still having this issue after trying this workaround.

Actually, it sounds like you've already fixed the error that is described in item 1.2.1 in the readme.  It sounds like you may need to change the build/deploy options in the Configuration Manager to match what you want to deploy for your scenario - currently, it sounds like it is deploying the Xbox 360 game but not launching it.

There is a topic in the XNA Game Studio 3.0 documentation that I think will help you here.  It describes how to configure startup project and solution configuration settings to control what projects get built and deployed in a cross-platform project.  You can find this topic under XNA Game Studio 3.0 | Using XNA Game Studio | Developing Cross-Platform Games | Managing Cross-Platform Builds and Deployment in the XNA Game Studio 3.0 documentation table of contents.

Can you please take a look at that and see if it helps here?

Thanks!