Captivate 7 - Backward Compatibility?

To test the Backward compatibility, I tried the following:

1. Opened a Project built in Captivate 6 in Captivate 7, saved the file and again reopened in Captivate 6 - It opened

2. Changed the Text (Text Caption box) content in Captivate 7 and reopened in Captivate 6 - The changes in Text (Text Caption box) were reflected in Captivate 6

3. Changed the properties of the Continue button to "Action -> On Success -> Go to Next Slide" - This change did not reflect in Captivate 6. It still had the original properties that was given to it in Captivate 6.

So my question is, "Is Captivate 7 Backward Compatible"??????????

Thanks,

Soumya