Gap in H1B validity dates

[gauravsaini228]

I have noticed the following gap in my H1B validity dates:

My original I797 valid till : Sep 30, 2014
Extension Filed by Employer on: Aug 15, 2014
Approval received on : Oct 23, 2014
Valid from date in new I797 : Oct 17, 2014

As you can see there is...

[aschweig]

I recently obtained a visa for travel to France. The dates of Validity say from Sept 1 to Oct 1. However, my flight is getting bumped up to Aug 29. Will I need to get a new visa if I arrive before the start date printed on the Schengen Visa? (And if I get a new visa, do I need to cancel my old one?)...